03861nas|a2200409 i 4500 20260818143143.0 111199s1999 th uu m rtt 00| a1eng d .b11765719 AIT Thesis no.WM-98-15 Nawarathna, N. M. N. S. Bandara Influence analysis of water balance and basin characteristics using GIS and remote sensing technology Bangkok : Asian Institute of Technology, 1999 63 leaves Thesis ; no. WM-98-15 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. School of Civil Engineering Thesis (M.Eng.) - Asian Institute of Technology, 1999 GIS and Remote Sensing technology have been used for the detailed analysis of distributed data in a wide area to understand hydrological process. Five watersheds in the tropical region of Southeast Asia have been selected for this research work. Relationship between runoff and catchment physical characteristic is formulated. Geologic and topographic characteristics of each basin are found out from the analysis of GIS data. NDVI (Normalized Differential Vegetation Index) dataset, which expresses the vegetation activities in the basin, is compiled from the A VHRR data of NOAA satellite. Tank model, one of the rainfall-runoff models, is used for the estimation of storage change in the ground water. Evapotranspiration, estimated by water balance equation, does not follow the same trend in all basins. Different surface condition, land use, elevation and vegetation activities for each basin are attributed to the different trend. Moreover, aspect of topography influences highly to hydrological processes. A aridity index, which can evaluate the potential vegetation, determines the magnitude of land development. Runoff, which is the water resource for our use, is influenced by the above factors. An attempt has been made to find out a suitable relationship between runoff and topographic parameters, climatic parameters, geologic characteristics and NDVI. Spatial variation of annual rainfall, runoff, potential evapotranspiration and actual evapotranspiration are investigated in all basins in the view of 1 km2 scale. Spatial variations of topography, geology and NDVI in both dry and wet season are studied carefully. Several combinations of hydrological and basin parameters are investigated to establish a suitable relation between them. The correlation between runoff with rainfall, NDVI, area, elevation and slope produced better result than other combinations. The relationship developed can be used in other basins to determine amount of annual runoff using rainfall and the basin characteristic derived from GIS and remote sensing technology. Water balance (Hydrology) Geographic information systems Remote sensing Kazama, So, Chairperson Gupta, Ashim Das, Examination Committee Morishita, Hideharu, Examination committee DAAD, Scholarship donor Asian Institute of Technology. Thesis ; no. WM-98-15 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B12618 .b11765719 mnait y 240420 0 991111 m a y 0 mnait mnarc 22 40 Barcode : 30050120592521 CREATED : 2014-03-26 RECORD # : i12780637 LPATRON : 1028614 LCHKIN : 2018-12-03 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 3 TOT RENEW : 2 Barcode : 30050160043062 CREATED : 2016-03-22 RECORD # : i12901581 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 60120 60120 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.WM-98-15 30050120592521 2026-08-18 14:31:43 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.WM-98-15 30050160043062 2026-08-18 14:31:43 2026-08-18 40