Task 1.6. Accomplished technical survey of the technical status of the existing river dikes and inland dike around the wetland area Kalimok/Brushlen. Technical report for the purpose of the design

1. Inspection for the conditions of dikes is accomplished. Places with disintegrates of the covering or some other notes mentioned in the report are coordinated and will be mentioned in the map materials attached to the report.

The inspections for the Danube river dike for Brushlen-Kalimok and inland dike are prepared from:

Eng. Ilian Dimov Iliev – hydro-meliorative building, head of department “Irrigation systems” Ltd Rousse.

2. The detailed survey of the crowns of the dikes is accomplished through coordination and survey according to the length of points on the crowns of dikes through 100 m or on typical places. This is preconditioning for comparison these data to the designed ones (where there are such kind of data).

The surveys are prepared in the following periods:

For Kalimok-Brushlen: 18-22 April 2003

Team:

Eng. Ilko Georgiev

Eng. Radoslav Pavlov

Supporting staff – 3 persons

Longitudinal sections of the dikes are prepared in scales: H 1:2500 and V 1:250 as a result from the surveys:

For Kalimok-Brushlen: of the Danube River dike, of the existing dike and of the places where a new one will be built bordering the area from west, south and east.

Four sections are formed:

1 – Danube River dike, 2 – inland dike from the pumping station “Nova Cherna” to the end of the existing dike. 3 – northward from the sector where there is not any existing dike along the existing channel. 4 – southward from the sector where there is not any existing dike along the existing road. 5 – from the section 3-4 along the existing dike to the pumping station “Tutrakan”.

The sections are classified in 10 sheets as follows:

Section 1 (Danube River dike) – 4 sheets with 2 drawings for each one of them.

Sections 2, 3, 4 and 5 (inland dike) – 6 sheets with 2 drawings for each one of them.

Attachment:

Longitudinal section Kalimok –Bryshlen, Scale ML 1:2500, Scale MH 1:250

3. Comparison of the data from the real survey with the designed levels

Only data for the Danube River dike for the area of Brushlen-Kalimok zone are found from the sources of “Irrigation systems”.

The data that can be compared are in the following table:

Km

Project 1947

Surveys 1971

2003

1

27+500

20.80

19.35

2

 I I ОPS

20.75

19.63

19.65

3

28+500

20.70

19.63

19.45

4

29+500

19.72

19.60

19.49

5

30+500

19.68

19.57

19.67

6

31+500

19.63

19.52

19.07

7

32+500

19.59

19.48

19.09

8

33+500

19.55

19.42

18.93

9

34+500

19.50

19.49

19.33

10

35+500

19.46

19.33

19.09

11

36+500

19.41

19.33

18.98

12

37+500

19.37

19.10

18.80

13

38+500

19.32

19.11

19.00

14

39+500

19.28

18.95

18.66

15

40+500

19.23

19.67

18.70

16

 I I I ОPS

19.40

19.45

18.55

17

41+500

19.18

19.00

18

41+952

19.16

17.95

19

42+452

19.34

19.80

Unfortunately the comparison of these data is impossible and if it will be done it will not be correct due to:

Drawing for the situation of the dikes from which the longitudinal sections are prepared is drawn up for clearness.

Attachment: Sites of longitudinal sections, Scale 1:10 000

4. Report for the inspection and the surveys of:

Danube River dikes “Tutrakan-Brushlian” from km 0+000 to km 14+000

According to the confirmed terms of reference during the inspection the following tasks are accomplished:

  1. Inspection of the conditions of the dikes
  2. Comparison of the data from the real surveys to the designed levels
  3. Evaluation of the condition of roads and transitions through the dikes
  4. Localization of the damages of the dikes (landslides, holes, filtration)
  5. Localization of the places for inspections and widening of the dikes
  6. Inspection and evaluation of the drainage facilities near the dikes
  7. Taking part in inspection of the survey of the places of the inlet-outlet facilities
  8. Preparation references for improving of the condition and pass ability for the dikes and facilities

І. INSPECTION OF THE CONDITION OF THE DIKES

The Danube River dikes protecting the wetland “Nova Cherna-Tutrakan” are located in west direction from the town of Tutrakan. The total length of the dikes is 14 km. “Irrigation systems” Ltd Rousse supports the dikes.

The situational allocation of the dikes is shown on the attached scheme. The cross section of the dike is trapezium-shaped with the following basic measurements:

Width of the crown – 4 m

Average height of the dike 3,50-4,00 m

Width of the basis of the dike – 17,00-20,00 m

Dike slope – average 1:1,5

During the inspection of the dike the following were stated:

- The water dike slope from km 28+320 to km 42+320 is overgrown with single trees and bushes;

- The land dike slope is overgrown with single trees and bushes in the sectors from km 32+020 to km 36+920, from km 37+820 to km 38+820, from km 41+320 to km 41+920;

- The dike crown is overgrown with bushes and single trees in the sector from km 34+020 to km 36+920

- There is need for building of the dike crown in the sector from km 38+120 to km 38+620. The size of the additional embankment is about 800-m3 soils.

Geodetic surveys were done for specifying typical points (damages, landslides, filtration and so on) along the dike length. Geodetic instrument MAGELLAN is used for the surveys. The data from the surveys are in the following table:

Table 1

No

km

N

E

Description

1

2

3

4

5

1

 42+320

44о 02,61

026о 35,37

Last building of “Slavianka” plant – Tutrakan, last foundation in north-east direction

2

 41+950

44о 02,60

026о 35,19

The beginning of the dike – to the back entrance of “Slavianka” plant – the beginning of the small dike

3

 41+850

44о 02,63

026о 35,17

End of the small dike. Beginning of the main dike

4

 41+680

44о 02,64

026о 35,03

В2 – (main dike) – shaft of the pumping station

5

 41+400

44о 02,52

026о 34,73

В3 – (main dike) – beginning of the old dike

6

 41+045

44о 02,56

026о 34,49

 Lock ОPS ІІІ

7

 40+090

44о 02,69

026о 33,82

В9 – first platform

8

 39+670

44о 02,62

026о 33,45

В10 – against the road, last platform

9

 38+930

44о 02,65

026о 33,06

В19 – against the last old Raney

10

 38+620

44о 02,62

026о 32,83

Beginning the sector for heaping

11

 38+120

44о 02,60

026о 32,66

End of the sector for heaping

12

 36+880

44о 02,43

026о 31,41

В20 – passing

13

 36+600

44о 02,40

026о 31,17

В22 – against the old point

14

 33+990

44о 02,32

026о 29,27

В34

15

 33+020

44о 02,12

026о 28,51

ОPS “Kalimok”

16

 30+720

44о 01,70

026о 26,88

В42

17

 28+325

44о 01,65

026о 25,21

ОPS ІІ

18

 28+320

44о 01,65

026о 25,09

Platform

The accomplished surveys and the census of the vegetation along the dike shows that there is need for cleaning of bushes of 395 000 m2 and 2064 single trees have to be cut down along the dike and the right of way to it.

ІІ. COMPARISON DATA FROM THE REAL SURVEYS TO THE DESIGNED LEVELS

The comparison of the dike situation in the moment is prepared in the following table showing the designed and real surveyed levels for the dike crown.

Table 2

No

point

km

Project from 1947

Real surveys 1971 for project preparation for dike building

Difference

Level

Black see system

Level Baltic system

m

m

m

1

 27+500

21,00

19,65

- 1.15

2

 ІІ OPS
 28+325

19,63

3

 28+500

20,90

19,63

- 1.07

4

 29+500

19,92

19,60

- 0.12

5

 30+500

19,88

19,57

- 0.11

6

 31+500

19,83

19,52

- 0.11

7

 32+500

19,79

19,48

- 0.11

8

 33+500

19,75

19,42

- 0.13

9

 34+500

19,70

19,49

- 0.01

10

 35+500

19,66

19,33

- 0.13

11

 36+500

19,61

19,33

- 0.08

12

 37+500

19,57

19,10

- 0.27

13

 38+500

19,52

19,11

- 0.21

14

 39+500

19,48

18,95

- 0.33

15

 40+500

19,43

19,67

+ 0.44

16

 ІІІ OPS
 41+045

19,40

19,45

+ 0.25

17

 41+500

19,38

19.00

- 0.18

18

 41+952

19,36

17,95

- 1.21

19

 42+452

19,54

19,80

+ 0.46

The actual state of the dike is below the project except the sectors from km 40+000 to km 41+000.

ІІІ. ROADS AND TRANSITS THROUGH THE DIKE

There are roads through the dike at:

km 42+320;
km 41+950;
km 41+850

There are transits through the dike at:

km 39+670;
km 38+930;
km 36+880;
km 28+320.

The facilities are in good conditions except the road at km 42+950 and the transit at km 36+880, where it is required to be heaped with 70-80 cm for reaching the designed dike crown.

ІV. LOCALIZATION OF THE DAMAGES of the dikes (landslides, holes, filtration AND SO ON)

Any landslides are not localized on the water and land dike slope. There are not any filtrations through the body and under the dike.

The suction pipelines (2) of the desolate pumping station at km 36+120 can create a problem. They pass under the dike and in case of corrosion can lead to the advent of flowing through the dike body nevertheless they are stopped from the side of the pumping station.

The level terrain at the foot of the dike is below the project level of overflowing (level 14) from the south part of the dike in the sectors shown in the following table. It is required for these sectors to be implemented fortification activities for the dike slope to be protected from eventual landslide.

Table 3

km
 length

Levels terrain in dike foot
From km
 To km
 m
 from
 to
31+135.38
 50
 14.00
 14.00
32+616.65
 50
 14.00
 14.00
32+830.35
 33+709.06
 1679
 13.95
 14.00
35+260
 35+325
 65
 13.95
 13.99
37+210
 below 14.00
37+410
 37+722
 312
 below 14.00
 19,80

In case the level of overflowing is adopted for 14,50 there will be more sectors of the dike with direct contact to the water from the wetland and it is required study for the filtration of the water through the dike body for determination stability of the north dike slope.

V. Localization of the places for inspections and widening of the dikes

It is required along the dike crown to be built a road with solid covering for assuring the access to the wetland and inlet-outlet facilities in all climate conditions. Widening and platforms for turns off of vehicles have to be built at minimum three places. Our recommendation is for the following places:

Inlet-outlet facility D

Nearby the transit at km 38+930

At km 31+820

VІ. Inspection and evaluation of the drainage facilities near the dikes

32 drainage collectors flowing to GOK-2 and OK “Turchil-2” exist at distance from 30 to 100 m from the dry foot of the dike in north-south direction. These collectors have to be cleaned up. Cleaning from bulrush, bushes and single trees is required for the part from Gok-2 as well.

Locks for water flowing from GOK-2 and GOK-1 at low waters of the Danube River exist in the sector of OPS III (Tutrakan) – km 41+040 and OPS ІІ (Nova Cherna) km 28+320. They are in good condition and function normally.

VІІ. Taking part in inspection of the survey of the places of the inlet-outlet facilities

The inlet and outlet facilities in the wetland are the following:

Point B is at km 28+325 (to OPS ІІ “Nova Cherna”). The place where the dike will be break off and inlet-outlet facility will be built was inspected. The inspection was done for the sector of the dike to the Danube River as well as for the protected area to the beginning of GOK-2.

Point C is at km 32+890. The place where the dike will be break off and inlet-outlet facility will be built was inspected. The inspection was done for the sector of the dike to the Danube River.

Point E is at km 41+090 (to OPS ІІІ “Tutrakan”). The place where the dike will be break off and inlet-outlet facility will be built was inspected. The inspection was done for the sector of the dike to the Danube River as well as for the protected area to the beginning of GOK-2.

VІІІ. Preparation references for improving of the condition and pass ability for the dikes and facilities

Main recommendations for improvement of the functional conditions and exploitation of the dikes:

1. Cleaning of the dike crown, dike slopes and dike rights of way (10 m from both sides of the dike) from single trees and bushes.

2. Building of the dike in above-mentioned sectors.

3. Cleaning the collecting and main flowing channels in accordance to secure the normal work of the system – cleaning from bushes, trees and so on.

4. Improvement pass ability on the dike crown in accordance to secure the maintenance and exploitation of inlet-outlet facilities and assuring conditions for inspections

5. Widening the dike crown for turns off of vehicles have to be built at minimum three places.

6. Cleaning and dragging of the drainage channels from OPS II and OPS III aimed creation of opportunity for entering the required for overflowing of the wetland waters.

Attachments:

  1. Cross section of the dike
  2. Longitudinal section of the dike
  3. Situation of the dike in scale 1:10 000

5. Inspection the condition of the drainage channels – the aim of the accomplished inspection was to find out their condition. Places with some notes regarding the channels and dikes are coordinated and will be marked on the sections of the facilities.

The inspections of the drainage channels are accomplished from:

Eng. Ilian Dimov Iliev

Eng. Yordan Kirov

Report for the accomplished surveys for the inland dike of Brushlen-Kalimok and the drainage channel:

DESCRIPTION

of the existing main drainage channel in the different sectors of its layout – from the point of its water collector in the Danube River at the pumping station “Brushlen” in north-west direction from Nova Cherna (this point we consider for km 0.000) to its water collector in the Danube River at the pumping station “Kalimok” in west direction from Tutrakan (km 16.030)

1 sector – from km 0.000 to km 0.510 (from Danube River to p.p. 1 and 2) - point В

The length of this sector is 510 m. It starts from the water collector of the main drainage channel in the Danube River and ends in the protecting dike.

The watersides of the channel are at the terrain level in this point. The right (west) waterside is higher average with 2 m in comparison to the Danube River level, as at some places it varies from 1.5 to 3 m. The data are from 23 April 2003.

The left (east) waterside is a little bit raised because of unevenly heaped earth masses. Its height is about 2 m and at some places reaches 2.5 – 3 m.

The channel is in good condition.

It is constructed facility with help of which water from the drainage channel in the south of the protecting dike is pumped and flow away to the north to Danube River or on the contrary – for storage of former breeding-ponds in this sector.

Right wing of the facility is partially demolished. Existing pump station is not dismantled.

2 sector - from km 0.510 to km 1.566

The length of this sector is 1056 m. It starts from p.p. 1 and 2 of the protecting dike after which the main drainage channel turns to south – southwest.

The layout passes though a water collector with another drainage channel coming from west (from the territory of Brushlen) at km 1.266. The watersides of the channel have average height 2 m above water level. The data are from 22 April 2003.

The sector ends at km 1.566, where there is water collection with third drainage channel also coming from west (from the territory of Brushlen). Its watersides have average height of 2 m.

The main drainage channel is deep and its watersides are at the terrain level. It is partially overgrown with trees and bushes in this sector.

The height of east (left) waterside is average 3 m above water level. At some places it reaches up to 3.5 – 4 m. The data are from 22 April 2003.

Average height of the west (right) waterside is 2.5 m but at some places reaches 3 m.

Generally drainage channel in this section is in good condition.

3 sector – from km 1.566 to km 1.925 (at p.p. 4)

The length of this sector is 359 m. It starts from the water collector of the main drainage channel with another drainage channel coming from west and flowing in it at km 1.566.

There is a right angle turn in east direction right after the water collector.

There is a water collector at km 1.925 with third drainage channel coming from east. The watersides of this channel have average height 2 m from the terrain level.

The sector ends at a concrete bridge at the foot of the dike starting from p.p. 4 right after the water collector with the above-mentioned drainage channel.

The watersides of the main drainage channel in this sector are unevenly formed.

The south (right) waterside is with average height 2 m above the water level at the sector right after the water collector with the second drainage channel from west (km 1.566) and the north (left) waterside is with average height 1 m. The height of the south waterside gradually falls to 1.50 m, then to 0.50 m and reaches almost 0 m and the height of the north waterside – to approximately 0.50 m. These data date from 21 April 2003.

In fact there is no waterside along the considerable part of the south waterside toward the above-mentioned date.

The low strip of land in south direction from the drainage channel is marsh-landed and it is overgrown with rush.

The north waterside of the drainage channel from km 1.925 in east direction to km 5.030 is formed from unevenly heaped earth masses and it is overgrown with rush.

The general condition of the drainage channel in this sector is bad.

4 sector – from km 1.925 (at p.p. 4) to km 2.300 (at p.p. 5)

The length of this sector is 375 m. It starts from the concrete bridge – right after the water collector with the drainage channel coming from east (km 1.925).

The main drainage channel takes the southeast direction right after the above-mentioned water collector.

The sector ends at a water collector with not too large drainage channel coming from south.

Dike starts at p.p. 4 in north direction from the right of way of the channel and continues to km 5.030 (before the triangular point No 6910). The dike has the average height 2.50 m according to the around terrain.

The south (right) waterside although it is low in this sector starts rising. There are almost not marsh-landed areas here. The waterside height is 1,50 m according to the water level at km 2.300. The data are from 20 April 2003.

The north (left) waterside is formed from unevenly heaped earth masses and it is overgrown with rush. There is permanent marsh-landing of the stripe of low land between it and the north dike. The height of this waterside is from 0.50 m to 1 m.

The general condition of the drainage channel in this sector is unsatisfactory.

5 sector – from km 2.300 (at p.p. 5) to km 3.560 (at p.p. 6)

The length of this sector is 1260 m. It starts from a water collector with a drainage channel coming from south and ends to passage through the marsh against a poultry farm of BAS.

The main drainage channel gradually changes its direction from southeast to east. The south (right) waterside of the channel has average height 1.5 m above the water level. The height is 1 m in the beginning and reaches to 2 m in some areas. The data are from 19 April 2003.

The north (left) waterside is formed from unevenly heaped earth masses and it is overgrown with rush. The height of this waterside is 1 m and varies in some areas from 0.50 m to 2 m.

The stripe of low land between the channel and the north dike is marsh-landed and it is overgrown with rush.

The general condition of the drainage channel in this sector is unsatisfactory.

6 sector – from km 3.560 (at p.p. 6) to km 4.120 (after p.p. 7)

The length of this sector is 560 m. It starts from passage through the marsh against a poultry farm of BAS and ends to a lock, which facilities get into the borders of a private dairy and pig-breeding farm.

The main drainage channel gradually changes its direction from east to northeast.

The south (right) waterside of the channel has average height 1 m above the water level. The height reaches 1.5 m in the passage areas. The data are from 18 April 2003.

The north (left) waterside is still formed from unevenly heaped earth masses and it is overgrown with rush. The length of this waterside is 1 m and it reaches 1.5 m in the passage areas.

There is permanent large marsh-landing with marsh vegetation of the stripe of low land between it and the north dike.

The lock is in comparatively good condition.

There are disjointed facilities – racks constructed for nurseries that are now desolated right after the lock (in north direction from the protecting dike).

There is another dike in north direction from the protecting dike, in north direction from the lock. It is connected again to the desolated nurseries.

The low left and right terrains from this dike are marsh-landed and they are overgrown with rush. The average height of this dike is 2.50 m.

The general condition of the drainage channel in this sector is unsatisfactory.

7 sector – from km 4.120 (after p.p. 7) to km 5.030 (before triangular point 6910)

The length of this sector is 910 m. It starts from a lock nearby to a dairy farm and ends to a sharp turn where the direction of the main drainage channel (up to here it is northeast) changes – first in southwest and then in southeast.

The parallel to the channel dike starting from the concrete bridge at p.p 4 and constructed in north direction from the main drainage channel leaves the right of way of the latest and takes north direction. The dike takes this direction at the above-mentioned turn. Its average height is 2.50 m according to the surrounded area.

The south (right) waterside of the channel gradually falls in this sector. Its height is 1 m according the water level (17 April 2003) at the beginning but it falls to 0.50 m in north direction and reaches 0.00 m in some areas.

The terrain between the drainage channel and the existing parallel road from south is marsh-landed and it is overgrown with rush.

The north (left) waterside is comparatively bettered formed with higher unevenly heaped earth masses. The height of this waterside varies according to water level from 1 m to 2 m in the east end of the sector.

The marsh-landing and rush in the low terrains between the north (left) waterside and the north dike gradually disappear in east direction due to the general rising of their altitude.

The general condition of the drainage channel in this sector is unsatisfactory.

8 sector – from km 5.030 (before triangular point 6910) to km 5.185 (before p.p. 8)

The length of this sector is 155 m. It starts from a sharp turn that changes the direction of the channel – first in southwest and then in southeast.

Other two drainage channels coming from north and respectively east are collected through drainpipes into the main drainage channel at the place of the sharp turn.

The watersides of the channel in this sector are not too high. There are heaps from earth masses over them. Their average height is approximately 1 m according the water level. The data are from 17 April 2003.

There is marsh-landed area of the low terrains eastwards to the sharp turn.

The general condition of the drainage channel in this sector is satisfactory.

9 sector – from km 5.185 (before p.p. 8) to km 5.620 – to the flap of the main drainage channel before right angle turn from where the channel takes the east direction.

The length of this sector is 435 m. The main drainage channel takes the southeast direction here and it is built parallel to a road. The road embankment has the average height 2 m above the river level (16 April 2003) and this embankment is at the same time the west (right) waterside of the channel.

The east (left) waterside is comparatively low and has average height 1 m.

There are not any marsh-landed terrains.

The general condition of the drainage channel in this sector is good.

10 sector – from km 5.620 to km 6.060

The length of this sector is 440 m. It starts from the flap at km 5.620 from where the main drainage channel takes the east direction.

The channel turns one more time at right angle in north direction after these 440 m.

The south (right) waterside has average height 1.50 m in this area.

The average height of the north (left) waterside is 2 m above the water level (16 April 2003). It is uplifted by unnatural mound. There are heaps from earth masses over them.

The general condition of the drainage channel in this sector is good.

11 sector – from km 6.060 to km 7.385 (at p.p. 9)

The length of this sector is 1325 m. It starts from km 6.060 from where the main drainage channel turns at right angle in north direction.

The channel turns one more time at right angle in northeast direction after 40 m and settles permanently in this direction.

The sector ends to a bridge closed to p.p. 9.

The south (right) waterside has average height 1 m according the water level in the beginning of this sector but it reaches 1,5 m in east direction (15 April 2003).

The north (left) waterside is uplifted by unnatural mound. There are heaps from earth masses over them at about 7 m distance one from each other. Its height is approximately 1 m according the water level in the beginning of this sector. The height reaches 1.50 m in east direction but falls to 1 m after that.

There are not any marsh-landed terrains in this area.

The general condition of the drainage channel in this sector is good.

12 sector – from km 7.385 (at p.p. 9) to km 8.290

The length of this sector is 905 m. It starts from a bridge closed to p.p. 9.

There is water collection with another drainage channel coming from northwest at 215 m eastwards from the bridge (km 7.600).

The sector ends to a water collector of the described main drainage channel with a third drainage channel coming from north.

The north (left) and south (right) watersides of the channel gradually fall in this sector. Their height is about 1 m above the water level in the beginning. Eastwards the south waterside falls to 0.50 m even to 0.30 m (14 Aprril 2003).

The north waterside of the channel from km 7.600 to km 8.290 (in the water collector) is formed comparatively well from embankment with height about 0.50 m above the water level of the drainage channel and of the water level of the marsh.

Large areas (especially northwards) are marsh-landed and they are overgrown with rush.

Eastwards the low terrains in south direction from the channel are marsh-landed too.

The general condition of the drainage channel in this sector is unsatisfactory.

13 sector – from km 8.290 to km 9.460 (at p.p. 12).

The length of this sector is 1170 m. It starts from a water collector of the main drainage channel with another drainage channel coming from north where the main drainage channel leaves the right of way of the designed layout.

The layout passes through desolated silage pits where p.p 11 is stabilized.

The sector ends to km 9.460 (the beginning of another channel) where p.p 12 is stabilized.

The north contour of the designed layout in this sector comes into contact with large marsh-landed and overgrown with rush areas. Their water level is measured in 13 April 2003.

There is no any drainage channel in the right of way of the designed layout from km 8.290 to km 9.460 (1170 m)!!!

14 sector – from km 9.460 (at p.p. 12) to km 10.760 (at p.p. 13)

The length of this sector is 1300 m. It starts from the beginning (at km 9.460) of the coincided with the designed layout another drainage channel.

This channel is flapped again and disappears at km 10.560.

The sector ends to a concrete bridge after p.p. 13 from where the designed layout takes the right of way of the drainage channel coming from north-northwest. This drainage channel is orientated eastwards from km 10.760.

The north (left) waterside of the channel is formed by unnatural mound in this sector. Its average height is 2 m above the water level and varies from 1.5 to 2.5 m in some areas (12 April 2004).

Large areas along the mound northward are marsh-landed and they are overgrown with rush.

The south waterside is at the terrain level. Its average height is 1 m. It is overgrown with trees.

The general condition of the drainage channel in this sector is good.

15 sector – from km 10.760 (at p.p. 13) to km 11.830

The length of this sector is 1070 m and starts from a concrete bridge across a road after p.p. 13.

A drainage channel coming from north-northwest takes the right of way of the designed layout from p.p. 13. This channel takes east direction from km 10.760.

Dikes from the protecting dike of the main channel start northward at km 10.910 and 11.145. They are built for nurseries that are now desolated. Three facilities and two racks constructed for the nurseries are built nearby the dike playing the role of north waterside of the channel.

The sector ends to a bridge at km 11.830 where another drainage channel coming from north water collectors to the main drainage channel.

The north (left) waterside is formed from a solid dike and its average height is 3 m above the water level in this sector. The height varies from 2.40 to 4 m in some areas (04 April 2003). The south waterside of the channel is not too high and it is above the water level a little. Its average height is 1.50 m.

Nevertheless the low terrain northward from the channel is marsh-landed and it is overgrown with rush along the whole sector.

The general condition of the drainage channel in this sector is good. Both watersides are overgrown with trees and bushes.

16 sector – from km 11.830 to km 13.540

The length of this sector is 1710 m. It starts from km 11.830 where another drainage channel coming from north is collected to the main drainage channel. The passing is realized through an existing bridge.

The layout passes through p.p.15 (km 12.460) and p.p. 16. The segment between them includes an arched turn and after it the channel takes east direction and after other 400 m – northeast direction.

The sector ends to a bridge at km 13.540 (before p.p. 17). This bridge makes possible the passing through a third drainage channel coming from north and water collectors to our main drainage channel.

The north (left) waterside of the channel is formed from low earth embankment in this sector. Its average height is 2 m above the water level (05 April 2003).

The south (right) waterside varies from 1.50 to 2 m.

The general condition of the drainage channel in this sector is good. Both watersides are overgrown with trees and bushes.

17 sector – from km 13.540 (to p.p.17) to km 14.800 (after p.p. 18)

The length of this sector is 1260 m. It starts from a bridge at km 11.830 that is built across another drainage channel coming from north collected to the main drainage channel.

The described drainage channel passes through two water collectors with drainage channels coming from northwest at km 14.300 and km 14.500.

The sector ends to km 14.800 where there is a water collector with forth for this segment drainage channel coming from north.

The north (left) waterside has average height 2 m in this sector. Its reaches to 2.50 m above the water level at some areas (06 April 2003).

The south (right) waterside has average height 1.50 m. Its reaches to 2.00 m above the water level at some areas.

The general condition of the drainage channel in this sector is good. Both watersides are overgrown with trees and bushes.

18 sector – from km 14.800 to km 15.850 (at p.p. 19 and 20)

The length of this sector is 1050 m. It starts at km 14.800 where there is water collection with another drainage channel coming from north into the main drainage channel.

The layout passing at km 15.380 is realized with a bridge of a drainage channel coming from the north and water collectors to the main channel.

A bridge connecting the north waterside of the main drainage channel and the pumping station with III class road for Tutrakan is built at km 15.540 of the main drainage channel.

The sector ends at km 15.850 at protecting dike (at p.p. 19 and 20).

The north (left) waterside of the channel has average height 2 m above the water level in this sector (10 April 2003).

The south (right) waterside has average height 2 m.

The general condition of the drainage channel in this sector is good. Both watersides are overgrown with trees and bushes.

19 sector – from km 15.850 (at p.p. 19 and 20) to km 16.030 (point Е)

The length of this sector is 180 m. It starts from the protecting dike at p.p. 19 and p.p. 20 and ends at the water collector of the main drainage channel into Danube River.

The watersides of the channel are at the terrain level in this sector. The terrain is afforested mainly with poplar forest. Their condition is good.

The average height of the two watersides is 2 m according the Danube River level. The data are from 11 April 2003.

20 sector is located in point С – around p.p. 23, 24 and 25 in the area of Kumluka. It is located in the region of desolated, dismantled and felt into decay pumping station.

The total length of this sector is 406 m. It starts at p.p. 25 at the right waterside of an existing drainage channel, passes through a desolated pumping station, crosses the protecting dike where p.p. 23 and 24 are stabilized, crosses more 80 m existing and bordered with earth embankments marshes and ends after 200 m to the water collector point of a desolated channel into Danube River.

The water level in the marshes is sounded on 24 April 2003.

This channel is dry. Its right of way is inconsiderable. The channel is completely missing in a segment of 15 m. The channel is partially filled up southward from this place – in a segment of other 15 m.

The channel exists in almost the same right of way and depth in the last 40 m to the point of its water collector in Danube River.

Both watersides are formed from an embankment that is missing in the sector of filling.

The left waterside of the channel is afforested with poplar.

The right waterside is not afforested from the marsh to the last 40 m before the water collector into the Danube River. These 40 m are afforested with poplar.

Attachments:

1. Sites of longitudinal sections Scale 1: 10 000

2. Longitudinal section Kalimok-Brushlen 10 pcs

Scales 1: 2500 / 250

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