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作者在文献［1］中讨论了作物种植结构的调整对农业自然灾害（主要是旱灾）的影响机理。本文在对湖南省洞庭湖区常德市鼎城区的实地调查基础上，应用全球定位系统技术（GPS），深入分析了土地利用变化（空间格局与经济密度）对水灾引起的农业灾害的影响机制．结果表明，家户年纯收入水平与水田面积占总土地面积的比例是决定农业水灾的主要因素．
In [1], the authors discuss the mechanism of crop plantation adjustment affecting agricultural natural disasters (mainly droughts). Based on the field survey of Dingcheng District, Changde City, Dongting Lake, Hunan Province, this paper uses GPS technology to deeply analyze the impact of land use change (spatial pattern and economic density) on agricultural disasters caused by floods. The results show that the annual net income and paddy field area of the total land area ratio is the main factor in determining agricultural floods.