FLOOD Analysis And Development of Groundwater Recharge and ... · ground water recharge potential at spatial scale 3. Spatial interpolation techniques can be used for filling th d

FLOOD Analysis And Development of Groundwater Recharge and Discharge

Estimate Maps using GIS

Dr Ghulam NabiDr. Ghulam NabiAssistant Professor

Center of Excellence in Water Resources Engineering, g gUniversity of Engineering and Technology, Lahore

Layout of Presentationy IntroductionFlood Warning SystemFlood Analysis of River ChenabGround Water Recharge and DischargeApplication of GRADE-GIS and PRO-GIS for pp

development of groundwater mapsConclusions

Historical floods in Pakistan From 1950 till 2010From 1950 till 2010

Year Fatalities Villages affected

1950 2,190 10,000 1956 160 11 6091956 160 11,6091957 83 4,498 1973 474 9,719 1976 425 18,390 1978 393 9,1991988 508 1,000 1992 1,008 13,208 1995 591 6,85,2001 219 50 2003 484 4,376 2004 85 47 2005 59 1 9312005 59 1,931

2007 918 2 million+[3][4]

2010 1,781+ 20 million[5]

Data Collection Network

FLOOD FORECASTING

Data Catchment

HEC

Rainfall

Transmission System

HEC

WAPDA

& PID

RiverField Surveys

- River Survey

& PID

HEC RAS+Geo-RAS- Flood forecasts by FFD

- Flood measurement

- Flood Plain MapsModel

Update

FFC

Relief Commissioner WAPDA Army PIDs PublicRelief Commissioner, WAPDA, Army, PIDs and Others

Public

Floods in Pakistan 2010

Source: Pak Met Office

Flood Analysis of River Chenaby

• Almost all watershed in Indian Control• No Flood Information Sharing• Controlled by Marala Barrage

Wh GIS Why GIS ?• River X-Section data is not available

Ti i d C tl• Time consuming and Costly• DEM can used to extract X-Sections• Easy to handle and modify• Different Scenarios can be studied easily

Location of Study Reach

INPUT DATA for HEC-GEO RAS INPUT DATA for HEC GEO RAS DEM 90m resolution Hydraulic data (Discharge ) Hydraulic data (Discharge ) Landuse and hydraulic Structure data Ri t i i St t d t River training Structure data Channel Roughness

U d D b d di i Upstream and Downstream boundary conditions Coefficient of Contraction and Expansion

R M d P River Meandering Pattern Main Channel and Flood Plain data

Water extents at Different X-Sections

Locations of Different X-Sections

Flood Extents at 1.5 Lac

Water depth (m)High : 6 85High : 6.85

Low :0.00015

Flood Extents at 3.0 Lac

Water depth (m)High : 9.28

Low :0.00015

Flood Extents at 7.0 Lac

Water depth (m)High : 10 6111High : 10.6111

Low :0.00015

Flood Extents at 11 Lac C Di hCusec Discharge

Water Depth (m)Water Depth (m)0.000015-0.66

0.66-1.36

1.36-2.03

2 03 22.03-2.74

2.74-3.56

3.56-4.68

4.68-5.96

5.96-7.21

7.21-8.45

8.45-10.61

Ground Water Recharge Discharge D t Fl d I d tiDue to Flood Inundations

Effective management of Ground water requires quantifying the interactions among the complex and uncertain the interactions among the complex and uncertain processes in the hydrologic cycle both at surface and underground

Groundwater recharge and discharge depend on the Groundwater recharge and discharge depend on the hydrological relationships among groundwater, climate, and surface water.

R h d di h ti i dil il bl Recharge and discharge zonations using readily available data in a short working time frame will help water resource managers and investigators plan more efficient strategies for additional modeling and data collection strategies for additional modeling and data collection activities required by conventional recharge and discharge estimation methods

Recharge and discharge zonations using readily available data in a short working time frame will help water data in a short working time frame will help water resource managers and investigators plan more efficient strategies for additional modeling and data collection activities required by conventional recharge and discharge estimation methods

GIS platform : PRO-GRADE and PRO-GIS

PRO-GRADE (Ground water Recharge and Discharge Estimator)

PRO-GIS (pattern recognition organizer for geographic information system)

Arc-GIS proves an ideal platform for the cross-analyzing approach to estimate initial recharge and discharge maps. Fast initial recharge and discharge estimation and p g gmapping help decision makers and modelers design more accurate and cost-effective models before initiating labor-intensive field measurements.g

Approach USED for Recharge potentialg

Computation AlgorithmGRADE-GIS

Data Requirement for GRADE-GIS

Topographic map Landuse and soil map Landuse and soil map hydraulic conductivity mapwater table map Bedrock elevation Bedrock elevation

SRTMShuttle Radar Topography MissionShuttle Radar Topography Mission

90 meter pixels for public 90 meter pixels for public 30 meter for researchers (maybe…) Web site: http://srtm.usgs.gov University of California at p g g y

Santa Barbara -http://www.uweb.ucsb.edu/~nico/comp/get_dem.htm

Punjab Ground Water Development Project Soil Monitoring Organization (SMO) WAPDA

P b I d P D Punjab Irrigation and Power Department

Data Input GRADE-GIS

DepthFinal_BedROCKV lValue

High : 156.998

Low : 6.00107

Legend150.0010681 - 166.7785339

166.778534 - 183.5559998

183.5559999 - 200.3334656

200.3334657 - 217.1109314

217 1109315 233 8883972217.1109315 - 233.8883972

233.8883973 - 250.665863

250.6658631 - 267.4433289

267.443329 - 284.2207947

284 2207948 300 9982605284.2207948 - 300.9982605

GRADE-GIS Application

PRO-GIS Application

Potential for 3 lac Flood

ValueHigh : 1.71183

Low : -1.48019

Value

Potential for 5 lac Flood

High : 4.63565

Low : -4.63565

Potential for 11 lac FloodValue

High : 301.007

Low : 149.987

Conclusion1. HEC Geo-RAS model can successfully applied for flood

Analysis and Flood Zoning with limited data

Conclusion

Analysis and Flood Zoning with limited data2. Output of HEC Geo-RAS In form of water depth at

spatial scale can be used as input for assessment of ground water recharge potential at spatial scale

3. Spatial interpolation techniques can be used for filling h d i l lthe data gaps at spatial scale

4. GRADE-GIS and PRO-GIS can efficiently used for development of groundwater discharge and recharge development of groundwater discharge and recharge potential sites

RecommendationsRecommendations DEM data should have verified with local elevation maps Landuse map should be developed using most recent Landuse map should be developed using most recent

satellite image Pumping test data should be used for hydraulic p g y

conductivity map development Results of GRADE-GIS and PRO-GIS should be verified

pre and post monsoon season

THANK YOU THANK YOU