GIS-based Rapid Loss Assessment on Flood Disaster; June 21 Flood of Fuhe Basin being A Case

摘要

In consideration of the serious loss of floods in our country, this paper established the method for assessing the water depth and duration of flood referring to the venerability curve of hazard bearing body, based on the concept of rapid flood loss assessment and from the perspective of regional disaster system theory. A model of rapid assessment on the loss of hazard bearing body was set up. The method for assessment of induced factor was established after analyzing the data equitability. The venerability curves of hazard bearing bodies were summarized, and then models for rapid assessing the hazard bearing bodies were built up using the overlay method of GIS. Taking the "6 · 21" flood of Fuhe basin as an example, this paper assessed the loss of crops, the damage of buildings and the affected population. The assessment results are basically in accordance with the reported data from investigation.