3.1.2. Data collection and analysis Collect data from various sources of geographical or statistical information for assessing exposure, sensitivity and adaptive capacity of the study area.
Exposure: The land cover maps of 2006, a soil texture map, the GDEM GIS map by ASTER (2011), and the statistics data of the maximum one-day precipitation in 2006 were collected to calculate runoff using the Soil Conservation Service Runoff Curve Number Method (Eqs. (2) and (3)). Runoff curve numbers were identified according to the characteristics of land cover and hydro logic soil groups for calculating runoff. For calculating the spatial accumulation of rainfall and runoff, the Hydro logic Analysis Tool set of Spatial Analysis Toolbox of Arc GIS 9.3 was used to model the flow of rainfall across the geographic surface in the study area.