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University of Twente (2014)

Integrating water resources modelling and remote sensing in Karkeh River Basin, Iran

Muthuwatta Lal

Titre : Integrating water resources modelling and remote sensing in Karkeh River Basin, Iran.

Auteur : Muthuwatta Lal

Etablissement de soutenance : University of Twente

Grade : Doctor University of Twente 2014

DEscriptif
The Karkheh River Basin (51,000 km2) is located in the south-western region of Iran between 30° to 35° northern latitude and 46° to 49° eastern longitude. The area covers parts of Hamedan, Kermanshahan, Lorestan, Ilam, Hamedan, Markazi, Kordestan and Khuzestan provinces. Major drawbacks in the basin are the low agricultural productivity, land degradation, soil erosion and low performance of irrigation. The growing competition between the various uses of water is among the major concerns in the basin. In the lower basin, bad management of the coexistence between irrigated agriculture and the wetland ecosystem has led to low water productivity, increasing salinity problems and reduced surface water availability. Under these circumstances, knowledge on spatial and temporal patterns of water availability and consumption is vital for planners and water managers. The objective of this study is to develop a methodology to simulate hydrologic catchment behavior in space and time dimensions and to assess water availability in and across the basin. The first part of the study focuses on estimating precipitation and actual evapotranspiration. Time-space distributions of precipitation will be estimated using geo-statistical techniques while for evapotranspiration estimation a satellite based surface energy balance approach is selected. The second part of the study focuses on semi-distributed hydrological modeling to simulate the discharge from the various sub-basin of the Karkheh. For this study a novel multi-objective model calibration procedure will be developed that requires observed discharge and actual evapotranspiration data as estimated in the first part of the study. During the third part of this study all previous results serve as input to an integrated water resources approach to allocate water for various utilization scenarios for future time windows.

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