Water Accounting and Productivity at Different Spatial Scales in a Rice Irrigation System: A Remote Sensing Approach (Volume 8) (English shop)

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This dissertation by Mohammad Mohsin Hafeez investigates water accounting and water productivity in rice irrigation systems at different spatial scales. The research focuses on evaluating irrigation water use, water reuse, and opportunities for improving water productivity and achieving effective water savings.

The study examines District 1 of the Upper Pampanga River Integrated Irrigation System (UPRIIS) in the Philippines. Water inflows and outflows, rainfall, groundwater pumping, percolation, and rice yields are analyzed across ten different spatial scales.

Satellite remote sensing data from Landsat 7, ASTER, and MODIS are used to estimate actual evapotranspiration through the Surface Energy Balance Algorithm for Land (SEBAL). The resulting estimates are compared with meteorological measurements and crop evapotranspiration calculations based on the modified Penman-Monteith method.

Particular attention is given to irrigation water reuse through pumping systems, check dams, and natural waterways. Water accounting indicators are applied to assess water productivity, identify water losses, and evaluate potential water-saving opportunities within the irrigation system.

The findings demonstrate that water productivity increases at larger spatial scales, primarily due to greater opportunities for water reuse. The dissertation provides insights into irrigation efficiency, spatial scale effects, and the development of more effective water management strategies for sustainable irrigated rice production.