The document summarizes a watershed management sessional/field work conducted at Khulna University. It details measurements taken of various areas within the university's watershed including buildings, roads, water bodies, and vegetative areas. Issues identified that negatively impact the watershed include erosion, waste dumping in waterways, and sediment/pollution runoff from developed surfaces into water. The total surveyed watershed area of Khulna University is approximately 105.6 acres.
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2. Watershed
Objectives of watershed survey.
Measurement areas in a watershed
Buildings, roads and other constructions of Khulna
University
Water bodies of Khulna University
Vegetative areas of Khulna University
Survey results
Problems to the watershed of Khulna University area
Overall condition of Khulna University Watershed.
4. A watershed, also called a drainage basin or
catchment area, is defined as an area in which all
water following into it goes to a common outlet.
It can be defined as a unit of area that covers all
the land which contributes runoff to a common
point
5. The area of land that drains water, sediment, and dissolved
materials to a common outlet at some point along a stream
channel”.(De Barry)
According to FAO (1986) “Watershed is a topographically
delineated area that has drained by a stream system i.e. the total
land area that is drained to some point on a stream or river”.
6. To know how to estimate the watershed of any
given area.
To know the drainage condition of the area.
To know the health of the vegetation .
To identify watershed problems and potential
sources of pollution.
To determine the possible cautions to preserve
watershed.
To help in proper management of watershed.
7. To know the features of watershed
Carrying capacity assessment
Health assessment of watershed
Risks assessment of watershed
Planning and design
Implementation
Monitoring
Readjustment of the plan of monitoring
8. Vegetation: Including trees, grasses, It prevents
soil erosion and land degradation
Topography
Soils: Drainage system, water holding capacity,
texture all the properties control watershed
Water body: Main component of watershed.
Pollution of water is responsible for changing
ecosystem and environment. Propagation of
fishes and other aquatic animals depends on
water body.
20. Road Area(sq. meter)
Brick road from Aparajita hall to
teachers’ quarter
1824
Brick road to employees building 272
Brick road beside Khan Bahadur
Ahsanullah Hall
1000
Brick road in front of Bangabandhu
hall
1032
Pucca road from Khanjahan Ali hall
to Aparajita hall gate
4632
Pucca road from KU lake to
Aparajita hall gate
80
Pucca road from KU main gate to
Hadi Chattor
3048
Pucca road in front of KU Medical 152
Brick road in front of Khan Bahadur
Hall
648
Pucca road in front of bus stand 324
21. Road Area (sq. meter)
Cafeteria road 164
Pucca road(s) from administration
building to teachers quarter
2368
Brick road beside teachers quarter 868
Brick road to the play ground 128
Brick road beside administration
building
1152
Brick road beside post office, bank 268
Brick road beside bank 144
Brick cover beside 2nd academic
building
448
Brick road in front of Adammo
Bangla
1056
Brick road from central library to
the back of 2nd academic building
2088
22.
23.
24. Moderate to severe surface erosion
Road Shoulder erosion
Direct flow to water body
25.
26. The buildings and constructions have a negative effect
on a watershed.
The clearing of vegetation due to construction, leads
to erosion. Building materials are also washed into the
water bodies. This has an adverse effect on stream and
river health too.
32. Building Name Area (sq.m)
Academic Building- 1 2580
Academic Building -2 5432
Academic Building -3 5040
Khan Jahan Ali Hall 2980
Khan Bahadur Ahasanullah
Hall
2800
Aparajita Hall 6012
Shaik Mujib Hall 2980
Caféteria 532
Central Mosque 360
Motor Cycle Stand 130
Primary School 280
BNCC Office 105
Purnendo Gain Lab 72
33. Building Name Area (sq.m)
V.C Banglo 244
Stuff Quarter - 1 580
Stuff Quarter - 2 600
Sharli Islam Library 415
Central Library 2556
Adohmmo Bangla 144
Shahid Miner 120
New Bank 85
Administrator Building 2292
Post Office 80
Agroni Bank and KU Studies 288
34. Building Name Area (sq.m)
Teachers Quarter - 1 180
Teachers Quarter - 2 185
Mukto Mancho 155
Medical Office 256
Agro-technology lab - 1 240
Agro-technology Lab - 2 240
Green House 54
Police Fary New 205
Forestry Lab - 1 245
Forestry Lab - 2 244
Roterate office 72
35. Run off after precipitation
Roof run off causing erosion
Improper ground water recharge
36. Total area of roads : 5.359 Acres.
Total area of buildings and other constructions :8.50421
Acres.
So, total runoff area is
5.359+8.50421=13.8632 Acres
37.
38. Crucial part of a watershed.
Consists mainly of
Lakes Ponds
Channels Rivers
Seas Ocean
39.
40.
41.
42.
43.
44. Survey Area Name Area(m2)
Pond of Khan Bahadur Ahsanullah Hall 2368
Frontage pond of Khan Bahadur Ahsanullah Hall 576
Ponds behind the Khan Jahan Ali Hall 1728
Central library(frontage side) pond (small) 360
Canal behind the 3rdaceademicbulding 3712
Pond Behind the quarters 1272
Fisheries' area beside the 2nd academic building
4340
45. Pond(small) behind the Odommo
Bangla monument
3311
Fisheries area beside the 1st academic
building
33588
42
Pond behind the Aporajita Hall 1356
Pond beside the Mosque 2688
University lake 14776
Total: 40075
49. Moderate to severe erosion
Ditch erosion
Throwing plastics, bottles, garbage etc to the paths of
water flow
Filling the water channels with sediments and waste
materials.
50.
51. Another inseparable element in any watershed is vegetation.
The vegetation in watersheds have impacts on
The quality of the water
Reducing sedimentation
Wildlife and bird habitat,
Soil health.
Air quality, etc.
Grasses, shrubs, and trees make up the majority of plant
cover . As leaves fall and decompose, they add the organic
matter to the soil
57. Slight or moderate surface erosion
Direct flow or runoff to water bodies
Throwing various waste materials
Using some forest grounds as parking lot.
58.
59.
60.
61. Ridge line
Sub Stream
Outlet
Main
Stream
Figure-1: Watershed in river basin with sub
stream
Sub
Watershed
Sub
Watershed
Sub
Watershed
Sub
Watershed
Main channel
Sub channel
Sub channel
Sub channel
Outlet
Figure-2: A watershed with sub watershed and sub
basin