dsd-int 2016 india ganges basin modelling - stuurman

iMOD in India Ganga Basin iMOD User Day - Delft Software Days 2016

Roelof Stuurman

(Frans Roelofsen, this week in Delhi: frans.roelofsen@deltares.nl)

The main focus is the river system. The groundwater study is supporting the river assessment

High level objectives (TOR WorldBank)

To significantly strengthen the capability of relevant central and state government agencies to undertake comprehensive evidence-based strategic basin planning for the Ganga River basin

To develop, document and disseminate (through detailed analytical work and stakeholder engagement) a set of plausible scenarios that balance significantly improving the health of the river and maintaining an acceptable level of economic productivity, and

To build stronger and more accessible information and knowledge base to guide ongoing dialogue around and management of the Ganga River basin

To establish ongoing multi-stakeholder engagement processes in the basin to support strategic basin planning

7 november 2016

7 november 2016

Set-up of the River Basin Model

WFlow

hydrology

routing

iMOD

ground water

pollutants

database

DWAQ:

water

quality

GANGA Dashboard

SPHY

mountain

hydrology RIBASIM:

water

resources

ecological

knowledge

rules

GANGA WIS

7 november 2016

Global scale water

demand model

(10x10 km grid)

Conceptual model

Stakeholder participation,

training

iMOD groundwater

model

Complex groundwater surface water interaction

7 november 2016

Types of groundwater – surface water interaction

7 november 2016

1. Continuous draining river,

3. Continuous Infiltrating river

(hydrological connection)

5. Continuous infiltration, (surface

water and groundwater

disconnected)

2. Periodically changing from

drainage into infiltration,

4. Through flow situation

iMOD model set-up

Project Advantages of iMOD:

• iMOD is open source and free

• Fast, flexible and consistent sub-domain modeling techniques.

• Can handle very large, high resolution models. Ganga basin > 3 million

grid cells

• Geo-editing of the subsurface

• Easy to use Graphical User Interface

• Powerful 2d/3d data visualization (also long time series)

• Easy model linking with other Deltares software for hydrology and water

resources ( e.g. WFlow/D-Hydrology and Ribasim)

7 november 2016

Infiltration / drainage Maps

What will be the results

Conceptual model

What will be the results

7 november 2016

Ground water model

Data sharing

Infiltration / drainage Maps

Conceptual model

Map of Groundwater Management Unit

iMOD initial model results

GW quantity –SW/GW interaction

? ?

?

? Flow direction unknown

Loosing river

River

7 November, 2016

3 day iMOD training in Delhi an Kolkatta

40 participants at 2 courses of each 3 days

7 November, 2016

Number of iMOD downloads in India

INDIA:

Largest number

of downloads

outside The

Netherlands,

30 downloads

7 november 2016

Status of the project

• Present (November 2016)

> Still some requests for data (geohydrology)

> Validating and processing data for mode input

> Linking iMOD with Wflow and Ribasim (set up tools to exchange water

fluxes / waterlevels)

• Near Future

> (ground)water models ready: March 2017

> Defining and calculating scenarios / measures: March - September 2017

> Project ready: December 2017

• Far Future

> On-going update and use of models by national/state governments and

consultants

7 november 2016

7 november 2016