Integrated

Water Resources Management

(IWRM)

PARITOSH SINGH CHAUHAN

Expert-Hydrogeology & Remote Sensing/ GIS

Water development and management should be based on a

participatory approach, involving users, planners and policymakers at all levels

What is Integrated Water Resources Management ?

A systematic process for the sustainable development,

allocation and monitoring of water resource use in the context

of social, economic and environmental objectives

An IWRM Plan should:

Problems to be Addressed

Water resources scarcity

Environmental Degradation

Water Policy framework

Long term planning

Sector Coordination

Supply and demand assessments

Water resources information system

Parameters to be considered for assessing ground water resources using quantitative methods

Lithology

Structural features

Aquifer geometry

Hydrological characters

of formation

Bore hole litho logs

Weather cycle

Climate

Rain fall

Evapo-transpiration

Humidity

Soil moisture

Wind velocity

* Geology & Soils * Hydrometeorology

Parameters to be considered for assessing ground water resources using quantitative methods

Aquifer type,

Flow pattern

Water level fluctuation

Specific capacity of wells

Topography

Drainage

Slope , aspect & gradient

*Hydro geomorphology * Hydrogeology

Aspects of Ground water

* Ground water Potential - Recharge characteristics

* Ground water Quality - Geogenic & Anthropogenic pollutants

Important components to be considered for modeling ground water

- Estimation of recharge from canals, tanks, reservoirs, field

ponds etc.

- Monitoring the aquifer conditions for different rates of

pumping

- Assessing the interaction between inter watersheds boundary

and their aquifer & flow conditions

Steps involved

in Ground water Modeling

- Formulation

- Approximation / transformation

- Computation

- Applications

- Evaluation

“on point” information

but regionalization is a ??

Temporal and spatial analysis

High resolution potential

Vegetation-Soil-Topography interface

Traditional

methods

Remote sensing

and GIS

Methods for Inputting the Information

Identification and delineation - Overlay analysis

Parameterizing - Based on end user requirements

Validation - Acceptability of the model and accuracy

Remote sensing techniques can not serve as “Stand Alone”

method but it is definitely a powerful complimentary tool set and

integrated to those already existing in WR modeling

OBJECTIVES

• Assessing the availability and requirement of

ground water in the study area

• Quantifying the surface and sub surface water

availability through development of models

METHODOLOGY

Various resource maps preparation (As of IMSD) Remote

Sensing & GIS.

Surface water estimation by SCS curve method (Verified with

strange curve method)

Sub surface water estimation by Lumped Surface cum sub

surface model and a distribution parameter (Mathematical model)

for the aquifer system

Assessing the Water balance.

Computation of Available Water Resources:

• Surface run off using land use,land cover and

hydrological soil group.

• Various in flow components like rainfall recharge,

river bed recharge, return flow irrigation, sub

surface in flow.

• Various out flow components like extraction for human, animal, agricultural consumption,sub

surface out flow, loss due to evapo transpiration

through natural vegetation.

For every 1km * 1km grid area.

Simulation of Model by

• Net Storage(NQ) with time interval of 15

days(T).

• The boundary condition

• Available pizometric heads

• Aquifer parameter