Received date: 2006-08-23
Revised date: 2006-12-21
Online published: 2007-03-25
Supported by
Key Laboratory of Poyang Lake Ecological Environment and Resource Development, No.PK2004017; National Natural Science Foundation of China, No.40561011
This paper examines quantitatively farmers' vulnerability to flood in the Poyang Lake Region (PLR) using GIS technique. The spatial unit for this analysis is township. The analysis consists of three major steps. First, the spatial extent and characteristics of flood risk areas were determined using a digital elevation model (DEM) derived from a 1:50,000 topographic map. Second, for each of the township values of six indices reflecting the economic activities of local farmers were computed. These indices are: percentage of rural population, percentage of farmland, GDP per acreage, percentage of employment in the first industry, net income per farmer and percentage of agricultural income. The values of these six indices were then normalized and used for vulnerability assessment. Third, the normalized indices (as GIS data layers) were overlaid with the flood risk areas to obtain the risk coefficient of each township and to calculate the overall vulnerability of each township. The analysis results show that there are large-scale flood risk areas which have a great impact on livelihood of the farmers in the PLR. 55.56% of 180 townships among flood risk areas have a high degree of vulnerability to flood. These townships stand at the lakefront around the Poyang Lake and the alongshore zones at the 'Five Rivers'.
Key words: flooding; farmer; vulnerability analysis; the Poyang Lake Region
MA Dingguo,,, LIU Ying, CHEN Jie, ZHENG Lin, ZHANG Wenjiang . Farmers' Vulner ability to Flooding in the Poyang Lake Region[J]. Acta Geographica Sinica, 2007 , 62(3) : 321 -332 . DOI: 10.11821/xb200703009
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