湖南城市洪涝易损性诊断与评估

首先从孕育洪涝灾害的环境变异性、社会经济灾敏性、城市土地利用对洪涝的放大作用，防洪标准和人为设障等方面对湖南城市洪涝的易损性进行了总体诊断。然后，选取人口密度、工业产值密度、道路网密度、排水管道密度、建成区绿地率等指标，运用模糊综合评判对之进行了定量评估。将全省城市洪涝的易损性程度划分为5个等级；高度易损性，较高度易损性、中度易损性、较低度易损性、低度易损性。研究结果表明：湖南城市洪涝易损性程度总体水平高，因此，湖南洪涝防治要从以农村为重点转向以城市为重点，加大城市洪涝治理力度；湖南城市洪涝易损性程度等级与城市规模之间没有对应关系，因此，湖南城市洪涝防治应因地制宜。

DIAGNOSIS AND ASSESSMENT ON VULNERABILITY OF THE URBAN FLOOD-WATERLOGGED DISASTER IN HUNAN PROVINCE

The general diagnosis for vulnerability of the urban flood waterlogged disaster in Hunan Province was carried out by analyzing environmental variability, urban location vulnerability, hazard sensitivity of urban socio economic conditions. By means of fuzzy comprehensive evaluation method, the quantitative assessment on vulnerability was made by electing aseries of indexes, such as population density, industry production value density, road network density and urban green land rate. The vulnerability degrees were divided into five grades,and the general vulnerability degree grade (level) of the urban flood waterlogged disaster is high and vulnerability degree grade has not corresponding relationship to the urban scale. The importance of prevention and control for flood waterlogged disaster must be transferred from countryside to city and the countermeasures must be suited to local conditions.