Application of Remote Sensing with Geographical Information System to determine Annual Discharge for a Small Watershed, 1995

Weesakul, Uruya

Research, Major Field of Civil Engineering, Thammasat University ( The Rangsit Center), Pathumthani 12121, Thailand

Abstract

Satellite imagery as spatial data from remote sensing, digital elevation model as spatial topographic data and other digital geographic information from existing maps are used to determine annual discharge. The methodology proposed emphasizes on the use of spatial data integrated by geographical information system to determine runoff. It is applicable for small watershed. The study area is a small mediteranean watershed in France. The result of data analysis shows that the most important factor on the annual discharge is the type of vegetation on each watershed.