Abstracts of PG.Dip. (WRD) Project Reports
Project
title:
Assessment of Local Views on
Water Logging in a Polder Project and its Solutions
Name
of the student:
Maqsud Hashem
Name
of the Supervisor:
Dr. Sujit
Kumar Bala
Date
of award of diploma:
Abstract:
Polders projects implemented in the coastal area of
At first, a
reconnaissance study was carried out in the study area through Transect Walk
and a Social Mapping was done for identifying stakeholders directly or
indirectly involved in the polder management. Four PRA groups were formed for
conducting Focussed Group Discussions (FGD), through
which problem identification and its ranking were performed. Historical Time
Lines in Water Management of Marichbunia Canal and
Seasonal Variation, the well known tools of PRA, were applied through
discussions with local farmers, fishermen, key informants, local leaders and
professionals. Finally, Problem Tree regarding
water management was generated by summarising the
local views of different stakeholders.
It has been found from the PRA that priority of problems varies according to occupation of people (farmers and fishermen), location of area (medium highland and low land) and gender (male and female). People of all groups confirm common opinion about maintaining sustainable FCD project. The local people showed their willingness to participate in operation and maintenance of water control structures. Water control structures should be constructed considering land elevation at micro level for better use and management. Local influential groups play vital role in decision making in rural water management. Common people are usually guided by decisions from local influential groups. Women possess their own views on water management. Their participation, role and ideas vary to some extent from men. Water professionals need to take a closer look at local views and ideas. Local views should be studied and taken into consideration by officials involved in water development project planning and implementation.
Project
title:
Determination of Location of Shared Stand
Posts for Vulnerable People at Duptara Village Piped
Water Supply System using GIS
Name
of the student:
Marina Rahman
Name
of the Supervisor:
Prof Rezaur
Rahman
Date
of award of diploma:
Abstract:
In
The Government and
the World Bank have agreed to support the implementation of an initial group of
pilot village piped water supply systems. Within these, Duptara
village piped water supply system is one of the pilot water supply systems
where the study is conducted to find the location of shared stand posts for
vulnerable people using GIS. The study included analysis of vulnerable people
of the community who are not able to pay even the lowest tariff for a shared
stand post. A limited number of stand posts with free access to water limited
to drinking and cooking purposes is to be provided for these vulnerable people.
The study has been conducted in three paras
at Duptara
Project
title:
Environmental
Impacts of Drainage Congestion inside the
Name
of the student:
Nahid Rezwana
Name
of the Supervisor:
Dr. Sujit
Kumar Bala
Date
of award of diploma:
Abstract:
Drainage congestion
inside Dhaka Town Protection Embankment (DTPE) has created serious
environmental changes in the western part of the
Project title:
Impact of Groundwater Irrigation on Dry Season Flow of the
Name
of the student:
Mousumi Datta
Name
of the Supervisor:
Dr. M. Shahjahan
Mondal
Date
of award of diploma:
Abstract:
In
Boro season (January to early May) was
considered for the study since groundwater is the only source of irrigation
during these four months. Average decadal (10- day) streamflow
and baseflow were calculated for these four months
over a period from 1973 to 1993. Time series of average decadal srtreamflow and baseflow showed a
declining trend of river flow. The study estimated the percentage of average streamflow and baseflow reduction
in the
Project
title:
Application
of Remote Sensing in Identifying Pollutant Spread in the
Name
of the student:
Mohammad Ruhul
Amin
Name
of the Supervisor:
Dr. G.M. Tarekul Islam
Date
of award of diploma:
Abstract:
An experimental method was applied to interpret
relationship among highly turbid water from
Project title:
Sediment
Transport Predictor in the
Name
of the student:
Shahana Akhter
Name
of the Supervisor:
Dr.
G.M. Tarekul Islam
Date
of award of diploma:
2004
Abstract:
The sediment transport characteristics of the
The unit stream power formula and
modified unit stream power formula have been applied for the estimation and prediction
of sediment transports in the
The sediment rating curve of the Ganges river at Hardinge bridge gauge station have been developed by
considering discharge, shear stress, stream power and unit stream power as
independent variables. The discharge and unit stream power when used as
independent variables give better curve as compared to shear stress and stream
power.
Project
title:
Environmental Impact of Drainage
Congestion in the DND Project Area and Its Mitigation Approach
Name
of the student:
Name
of the Supervisor:
Date
of award of diploma:
2005
Abstract:
Most of the DND Project area has now become
part of the suburban areas of
The study revealed that the main causes of
drainage congestion are: inadequacy of drainage canals, filling up of drainage canals
by solid waste, land use transformation through unplanned and rapid
urbanization, limitation of the pumps, not starting the pump timely by the
operators, accumulation of polythene in the drainage canals, filling up and
reduction of drainage canals, encroachment of drainage canals by unauthorised establishments, elevating the road towards
plinth level, household waste obstructing drainage channel, construction of
roads by earth filling in the canals, absence of proper drainage systems and
discharge of different industries particularly by dying industries. The
negative impacts in hydrology sector as identified were: water logging, water
pollution and hideous smell, while the same as identified in the agricultural
sector were: decrease in agricultural lands, yields and land fertility,
decrease in pasture lands and fodder, problems in preparation of seed beds. The
negative impacts in fisheries sector as identified were: increase in fish
diseases and overtopping of fishponds, while the same as identified in health
sector were: deficiency in pure drinking water, malnutrition and health hazards
of the people especially the children; increase of water borne diseases,
mosquitoes and venomous animals and insects. The negative impacts as identified
in the socio-economic sector were: decrease in employment opportunity and
income of the farmers, change in occupation, damages of homesteads, educational
& other institutions and difficulties in schooling of the children, change
in land ownership and as a whole decrease in quality of living of the people.
Environmental Impact Assessment (EIA) on the hydrological, agricultural,
fisheries, health and socio-economic sectors of the DND Project area revealed
that the total Environmental Impact Value (EIV) was negative by -200.
Based on the findings of the analyses mitigation
measures for reducing the potential negative impacts of drainage congestion
suggested include re-excavation and improvement of the khals
and canals, preservation of the retention ponds and storage reservoirs, and
eviction of unauthorised possessions in the retention
ponds, Removal of the unauthorised bunds constructed
for fish
culture, adoption of effective zoning, land use control and regulation to
prevent unplanned and haphazard land use transformation.
Project
title:
DEVELOPING GIS TOOL TO IDENTIFY CRITICAL AREAS FOR DRINKING WATER SUPPLY
DURING DRY SEASON IN DINAJPUR DISTRICT
Name
of the student:
S. M. TANVIR HASSAN
Name
of the Supervisor:
Dr.
A.K.M. Saiful Islam
Date
of award of diploma:
2005
Abstract:
Huge drawdown of the groundwater
table is one of the environmental hazards due to large scale groundwater
withdrawal during dry period. Hand tube wells (HTWs)
and shallow tube wells (STWs) operated under gravitational
force, are the main supplier of drinking water in rural areas may be dry out
due to excessive drawdown. This worst condition of drinking water supply in
rural areas has been found in the north-west part of
The existing groundwater table of
the study area has been analyzed from different groundwater observation wells
of BWDB for the last available nine years’ data. Three interpolation methods
available in GIS namely, inverse distance weighted (IDW), Thin-plate Spline and Kriging have been
tested to construct groundwater level surface from the observation well data.
Among this three interpolation methods, Kriging with
ordinary linear semi-variance model has given the most accurate result when a
few number of groundwater observation well data available. This study showed
that the most of the critical areas lie in Biral, Dinajpur Sadar, Kaharole and Khansama upazilas of Dinajpur district
where annual groundwater level fluctuation is in the range of 4.0m to 11.0m. Bochagonj, Birganj and Chirirbandar upazilas of Dinajpur district have been found as negligible critical
areas where annual groundwater level fluctuation varies from 1.5m to 6.5m. This
study also developed some customized tools using Avenue scripts (built in
object-oriented programming language) in ESRI’s ArcView GIS 3.2 software with Spatial Analyst 2.0 extension
to make the delineation of water scarce areas easy for different time on the
basis of available data.
Project
title:
An Experimental Study on Sediment
Deposition over the Floodplain due to Different Sediment Concentrations in the
River Channel
Name
of the student:
Syed Mahabubul Haque
Name
of the Supervisor:
Dr. Anisul Haque
Date
of award of diploma:
2006
Abstract:
The sediment concentrations in the
rivers not only vary with time but also vary with different locations of rivers.
Even this sedimentation concentration may vary with hours in a day due to the
change in velocity, water flow etc. It also varies with various seasons in a
year. When a specific length of an earthen embankment fails, floodwater with
high velocity enters into the floodplain through the embankment breach, piping,
overtopping etc. Thus floodwater spreads over a large area of the floodplain
causing sediment deposition due to the reduction of water velocity. Also when
there is no embankment in between the floodplain and river channel, in rainy
season devastating floodwater also enters in to the floodplain through out the
length of the river. This overland flow (without any embankment in-between the
floodplain and the river channel also) spreads over a large area of the
floodplain causing sediment deposition due to the reduction of water velocity.
The present study has been carried out to find out the patterns, thickness,
areas and volumes of sediment deposition over the floodplain due to embankment
breach and overland flow.
This
study was carried out in a physical model. The sediment concentration was kept
in between 500-3000 mg/l. In all experiments 20 cm embankment breach length and
6 cm height was considered. Each experiment was carried out for the elapsed
time of 30 minutes. The measurements of sediment thickness for all the
experiments were made (after the elapsed time 30 minutes) both laterally and
longitudinally at 2 cm interval over the floodplain.
The
results of the study give useful information to understand the mechanism of
sediment deposition over the floodplain due to embankment breach and overland
flow for different sediment concentrations in the river channel. In general the depth, area and volume of sediment deposition in the
floodplain increases significantly with increased sediment concentrations in
the river channel. The sediment deposition in the floodplain due to
fixed embankment breach takes the form of a loop having the center at the
breach location. Sediment deposition due to overland flow does not take the
form of a loop, sediment deposition follows the path
of the river flow, e.g. parallel to the river. The adjacent area at the
location of the embankment breach is more vulnerable than the area far from the
breach location.
A statistical
analysis was carried out to find out the relation of maximum, mean, area and
volume of sediment deposition over the floodplain due to embankment breach and
overland flow with various sediment concentrations in the river channel. As a
whole polynomial relation is the best to describe the relation between maximum,
mean, area and volume of sediment deposition over the floodplain for various
sediment concentrations in the river channel.