Assessment of Agricultural Vulnerability to Flood-Waterlogging Disaster in Hunan Province
湖南省农业洪涝灾害易损性分析与评价

Hunan Province is an important agricultural production base in Chain,but agricultural flood-waterlogging disaster is a serious disaster of the province.It often occurs suddenly and does large harm to agriculture.The agricultural flood-waterlogging disaster is caused by the flood hazard and the agricultural vulnerability.Therefore it is necessary for man to reduce flood occurrence frequency and the agricultural vulnerability.However,it is difficult for the humans to change the occurrence process of the flood at present,instead,it is a main measure for man to reduce the agricultural vulnerability.It hence becomes a hot topic for disaster studies to assess agricultural vulnerability.Based on analysis of flooding disaster system,the concept of agricultural vulnerability to flood-waterlogging disaster is defined,which means the nature of a specific region's agriculture system to resist agricultural flooding disaster in a certain agricultural production way and under the specific socio-economic background.The agricultural vulnerability is affected by many factors,for example precipitation,soil erosion,forest fragmentation,terrain characteristic,agricultural output value,population density,average per capita income,water conservancy facilities and so on.The reasons of forming factors are analyzed generally on the agricultural vulnerability to flood-waterlogging disaster in Hunan Province.The indicators to assess vulnerability of agricultural flood-waterlogging disaster has established in Hunan Province.Taking the county territory as the unit,the author has assessed vulnerability to the agricultural flood-waterlogging disaster.The result indicated that agricultural vulnerability is the biggest in Xiangyin county,and the smallest in Xinhuang county.The Tungting lake plain belongs to the intensively vulnerable area.The basin in Hunan belongs to intensively vulnerable area.The eastern and south knoll belongs to the moderate vulnerable area.The western mountainous in Hunan province belongs to the mild flooding disaster vulnerable area.The concrete measures to reduce vulnerability of agricultural flood-waterlogging disaster are proposed for different districts.