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035			_a.b11784209
099		9	_aAIT Thesis no.AC-99-32
100	1		_aRathnayake, W. M. U. K.
245	1	0	_aApplication of GIS for soil erosion control planning : _ba case study of Kandy district, Sri Lanka
260			_aBangkok : _bAsian Institute of Technology, _c1999
300			_a64 leaves
490	1		_aThesis ; _vno. AC-99-32
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development
502			_aThesis (M.Sc.) - Asian Institute of Technology, 1999
520			_aSoil erosion is a major environmental issue posing threat to sustainable agriculture. For effective erosion control, it is needed to estimate the soil loss and to identify the key factors using an effective and accurate method. Thematic maps of R-factor, K-factor, L-factor, S-factor, C-factor, P- factor and population density for two different years were prepared from the information of rainfall data, soil analysis, contour map, landuse maps and population data respectively. Soil erosion maps, 1981 and 1993 for Kandy district, Sri Lanka were prepared with combining the all derived information of USLE using GIS facilities. The maps showing the changes between two time periods for erosion, rainfall, landuse and population density were developed to identify the effects of selected parameters on soil erosion in the study area. The results show the increment of the level of soil erosion with the time, mainly due to the variation of rainfall and it can be reduced changing the pattern of land uses, while the other factors such as soil and slope remain same. It can be seen a relationship between the changes of population density and that of land uses, which are more related to erosion and a methodology should develop to correlate these in detail.
650		0	_aGeographic information systems
650		0	_aSoil conservation _zSri Lanka _zKandy
700	0		_aApisit Eiumnoh, _eChairperson
700	1		_aShivakoti, Ganesh P., _eExamination Committee
700	0		_aKaew Nualchawee, _eExamination Committee
710	2		_aThe Norwegian Government (Norway), _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. AC-99-32
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B12631
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