PROJECT PROPOSAL FOR PDS UNDER HYDROLOGY PROJECT PHASE-II

STUDY OF RESERVOIR SEDIMENTATION IMPACTSTUDY OF RESERVOIR SEDIMENTATION, IMPACT ASSESSMENT AND DEVELOPMENT OF CATCHMENT AREA

TREATMENT PLAN FOR KODAR RESERVOIR IN CHHATTISGARH STATECHHATTISGARH STATE

SUBMITTED TOHP-II CELL

CENTRAL WATER COMMISSION, NEW DELHI

BY

WATER RESOURCES DEPARTMENTWATER RESOURCES DEPARTMENT, GOVT. OF CHHATTISGARH, RAIPUR

NATIONAL INSTITUTE OF HYDROLOGY REGIONAL CENTRE, SAGAR (M.P.)

C G G C SPARTICIPATING AGENCIES

PROJECT LEADER

Water Resources Department, Govt. of Chhattisgarh, Raipur

PROJECT LEADER

Govt. of Chhattisgarh, Raipur

PROJECT PARTNER

National Institute of Hydrology, Regional Centre, Sagar (M. P.)

PROJECT DURATION : 3 YEARPROJECT DURATION : 3 YEAR

TOTAL BUDGET ESTIMATE : Rs. 34.33 Lakh

WRD, Govt. of Chhattisgarh, Raipur : Rs. 22.26 Lakh g pNIH, RC, Sagar : Rs. 12.07 Lakh

NEED OF SCIENTIFIC STUDY ON RESERVOIR SEDIMENTATIONSEDIMENTATION

Soil & water are two important natural resources.Nature takes 200 to 400 years to build up 1 cm of topsoil.About 12,000 M tones of soil lost every year by water action.Reduced capacities affect reservoir operation and irrigation efficiencies.Priority areas for conservation measures can be fixed on the basis ofsoil loss assessment.Cropping pattern can be modified and yield can be increased.The results of the sediment modeling can be implemented on otherreservoirs and designing of new projects.Conservation measures suggested will reduce the incoming sedimentin to reservoir and increase the life of the reservoir and projectin to reservoir and increase the life of the reservoir and project.Dissemination of knowledge and findings will be able to develop theawareness in farmers and other departments for soil conservationmeasures.easu es

OBJECTIVES OF THE STUDY

1 Assessment of present status of reservoir storage by estimating revised1. Assessment of present status of reservoir storage by estimating revised

capacity using remote sensing approach.

2. Sediment modeling.

3. Assessment of soil loss from catchment area.

4. Prioritization of catchment area based on geomorphological characteristics,

sediment yield and risk of erosion and soil loss from sub-catchments.

5. Detection of change in land use and other environmental parameters

responsible for sedimentation in reservoirresponsible for sedimentation in reservoir.

6. Development of management plan for catchment area with area specific soil

conservation measures for minimizing sedimentation in reservoir.

STUDY AREASTUDY AREA

Kodar reservoir is situated on river Kodar which is a tributary of Mahanadi.Location : Tahsil : Mahasamund (Raipur)Location : Tahsil : Mahasamund (Raipur)

Latitude : 21-11’50” N & Longitude : 82-10’-40”E Year of start of operation : 1976-77Dead Storage Level : 286.04 mFull Reservoir Level : 295 24 mFull Reservoir Level : 295.24 mGross Storage Capacity : 160.35 MCMDead Storage Capacity : 11.33 MCM No. of villages served : 49Head works consist ofHead works consist of

Earthen dam : 3.26 km longTop width of dam : 4.577 m Waste weir : 183 m longLeft Bank Canal (LBC) : Length is 23 30 km & CCA is 16066 haLeft Bank Canal (LBC) : Length is 23.30 km & CCA is 16066 ha. Right Bank Canal (RBC) : Length is 10.60 km & CCA is 7406 ha.Length of distributaries : 67.75 kmLength of minors : 278 km

Total culturable area : 53679 acres (21740 ha )Total culturable area : 53679 acres (21740 ha.)L.B.C . : 36436 acres R.B.C. : 17243 acres

DRAINAGE MAP UP TO KODAR RESERVOIRDRAINAGE MAP UP TO KODAR RESERVOIR

Catchment area : 317.17 sq. km.

Mean rainfall : 1433.1 mm

T h Hill & tTopography : Hilly & steep

Water spread (FRL) : 8850 acres

LAND USE MAP

Main land uses are :• Forest : on ridges• Agriculture : on plainsg cu tu e o p a s• Waste land• Built up• Water bodies

SOIL TYPES IN CATCHMENT OF KODAR RESERVOIR

Soil is mainly fine loamySusceptible toSusceptible to excessive erosion

1. Preparation of inventory on hydrology, meteorology, geology, landuse soil reservoir elevations and other details

METHODOLOGY

use, soil, reservoir elevations and other details.Collection and analysis of rainfall, reservoir details, levels, land usepattern, drainage etc.Contours, geology, geomorphology & hydrogeomorphology.Soil type soil depth infiltration rate hydraulic conductivity etcSoil type, soil depth, infiltration rate, hydraulic conductivity etc.Procurement of remote sensing data on the basis of reservoirlevels.

2. Instrumentation and collection of hydrological and sediment datain different inflowing tributaries.in different inflowing tributaries.

Upgrading of gauge-discharge and sediment sampling sites.Regular collection and monitoring of sediment samples.

3. Preparation of thematic maps on drainage, soil type, land use,contours, villages, road network, geology in GIS environment.contours, villages, road network, geology in GIS environment.

Preparation of base map of Kodar reservoir includes river networkand reservoir.Generation of thematic maps of catchment area, contour, soils,land use, geology, road and rail network, villages etc. and, g gy, , gdevelopment of Digital Elevation Model in GIS environment.

4. Estimation of revised reservoir capacity using remote sensingtechnique

METHODOLOGY

technique.Determination of revised water spread areas at different elevations bydigital image analysis of remote sensing data.Estimation of revised capacity and computation of losses at differentlevelslevels

5. Application of sediment prediction model.Analysis of hydro-meteorological, discharge and sediment samples.Application of suitable sediment yield model.

6 Prioritization of catchment area based on soil loss using6. Prioritization of catchment area based on soil loss usinggeomorphological characteristics, Universal Soil Loss Equation(USLE) and sediment yield.

Determination of present land uses in the catchment area fromremote sensing data and estimation of soil loss from various sub-gcatchments using USLE modelDetermination geomorphological characteristics of sub-catchments.Determination of sediment yield using suitable model from sub-catchments.Prioritize the sub catchments considering the present state of stressand environmental degradation.

7. Impact assessment analysis on sedimentation and runoff due todegradation in the catchment

METHODOLOGY

degradation in the catchment.Suggestion for suitable measures of soil conservation in thecatchment area.Analysis of impact of suggested measures on sediment.

8. Preparation of catchment area treatment plan.Development of management plan for the catchment area consistingof priority areas, extent of erosion, suitable conservation measuresand their effect on erosion from the catchment and catchment areatreatment plan.

WORK PLANWORK PLAN

Water Resources Department, Govt. of Chhattisgarh,

• Hydrological and hydro-meteorological data collection and preparation of

Water Resources Department, Govt. of Chhattisgarh, Raipur

inventory.• Upgradation of gauging and sediment sampling sites.• Monitoring of hydrological and hydro-meteorological data.

P i d l i f h d l i l d h d t l i l d t i• Processing and analysis of hydrological and hydro-meteorological data using statistical methods, SWDES and HYMOS.

• Generation of various thematic maps using GIS.• Evaluation of soil properties.Evaluation of soil properties.• Development of catchment area treatment plan.• Interim report preparation (yearly) and final report submission. • Dissemination of knowledge, findings and application of the management plan to g , g pp g p

field engineers and common people through preparation of Manual, leaflets, booklets and by organizing workshops.

WORK PLANWORK PLAN

National Institute of Hydrology Regional Centre

T h i l t f it i f d t d d t t

National Institute of Hydrology, Regional Centre, Sagar

• Technical support for monitoring of data and data procurement.

• Assessment of present land use using remote sensing data and GIS for the

catchment area.

• Estimation of soil loss from the catchment.

• Assessment of sedimentation in the reservoir.

• Development of sediment prediction model.

• Prioritization of environmentally stressed areas in the catchment.

• Impact assessment analysis on sediment yield.

TIME SCHEDULEFirst Year

Data collection and p epa ation of in ento• Data collection and preparation of inventory.• Upgradation of gauging and sediment sampling sites.• Monitoring of hydrological and hydro-meteorological data.• Processing and analysis of hydrological and hydro-meteorological data • Generation of various thematic maps using GIS.• Interim report preparation (1st year).

Second YearSecond Year• Monitoring of hydrological and hydro-meteorological data.• Processing and analysis of hydrological and hydro-meteorological data • Evaluation of soil properties.• Assessment of present land use using remote sensing data and GIS. • Assessment of reservoir sedimentation.• Estimation of soil loss from the catchment.• Interim report preparation (2nd year). p p p ( y )

TIME SCHEDULE

Third Year • Monitoring of hydrological and hydro-meteorological data.• Processing and analysis of hydrological and hydro-meteorological data • Estimation of soil loss from the catchment • Development of sediment prediction model.• Dissemination of knowledge and findings to field engineers and common

people by organizing workshops.V lid ti f di t di ti d l• Validation of sediment prediction model.

• Prioritization of environmentally stressed areas. • Development of catchment area treatment plan.

Impact assessment analysis on sediment yield• Impact assessment analysis on sediment yield.• Dissemination of knowledge and findings to field engineers and common

people by organizing workshops.• Final report submission. a epo t sub ss o

BUDGET ESTIMATION (YEAR WISE) FOR WATER RESOURCES DEPTT CHHATTISGARH

Investment Cost

RESOURCES DEPTT, CHHATTISGARH

Items 1st Year 2nd Year 3rd Year Total

Consultancy support - - 200000 200000

Procurement of software and data acquisition

100000 100000 - 200000data acquisition

Civil works - 200000 200000 400000

Equipment 300000 100000 400000

Training workshop and courses - - 100000 100000Training workshop and courses 100000 100000

Total 100000 600000 600000 130000

Recurrent CostItems 1st Year 2nd Year 3rd Year Total

Incremental O&M costs - 80000 90000 170000

Incremental staff costs 50000 300000 300000 650000(including travel)

Total (Rs.) 50000 380000 390000 820000

BUDGET ESTIMATION (YEAR WISE) FOR NIH, RC, SAGAR

Investment CostItems 1st Year 2nd Year 3rd Year Total

Consultancy support - - - -

Procurement of software and data acquisition

200000 50000 - 250000data acquisition

Civil works - - - -

Equipment 100000 100000 - 200000

Training workshop and courses - - - -Training workshop and courses

Total 300000 150000 - 450000

Recurrent Cost

Items 1st Year 2nd Year 3rd Year Total

Incremental O&M costs - - - -

Incremental staff costs (including travel)

100000 300000 300000 700000(including travel)

Total (Rs.) 100000 300000 300000 700000

Skilled Person: Assistance in data collection, data analysis, compilation, field visits

TOTAL BUDGETTOTAL BUDGET

WATER RESOURCES DEPTT, CHHATTISGARH

Items 1st Year 2nd Year 3rd Year Total

Total Investment & recurrent Cost 150000 980000 990000 2120000

Contingency (5%) 7500 49000 495000 106000

SSub-total 157500 1029000 1039500 2226000

Overhead charges (20%) - - -

Total (Rs.) 157500 1029000 1039500 2226000

Grand Total (Rs.) 157500 1029000 1039500 2226000Grand Total (Rs.) 157500 1029000 1039500 2226000

Items 1st Year 2nd Year 3rd Year Total

NIH, RC, SAGAR

Total Investment & recurrent Cost 400000 450000 300000 1150000

Contingency (5%) 20000 22500 15000 57500

Sub-total 420000 472500 315000 1207500

O h d h (20%)Overhead charges (20%) - - -

Total (Rs.) 420000 472500 315000 1207500

Grand Total (Rs.) 420000 472500 315000 1207500

EXPECTED OUTCOMES

Revised elevation-capacity curve for the reservoir.Sediment modeling may be helpful to assess the relationship between siltload with hydrological and meteorological parameters.This results of the modeling study may be extended to other projects anddesign of new projects in Chhattisgarh statedesign of new projects in Chhattisgarh state.Causes of environmental degradation in the region.The conservation measures suggested, if implemented will enhance the lifeof reservoir and irrigation efficiencies.gThe awareness program supported with scientific study will encourage thelocal farmers and other field agencies for implementation of conservationmeasures.Th i iti ti t d ill b f l t l t th tibl tThe prioritization study will be useful to select the areas susceptible toserious erosion & impact assessment analysis may be useful to see theimpact of conservation measures.

TARGETED BENEFICIARIES

Water Resources Department

TARGETED BENEFICIARIES

p

Agriculture Department

Command Area Development Authority

Forest Department

Water Users Association

Farmers