作　　者： ; ; ; ;

机构地区： 中山大学地理科学与规划学院水资源与环境系

出　　处： 《水文》 2008年第5期57-60,共4页

摘　　要： 通过分析珠江三角洲最近几十年的气候、下垫面及人类活动资料,揭示了三角洲洪水孕灾环境的深刻变化。主要表现为三角洲气温明显上升,降水变率增大,河系简化,河床普遍下切、变窄,滩涂面积减少,口门延伸,地表不透水面积增大等。结合最近几次大洪水的水文情势,综合分析了三角洲洪水对孕灾环境变化的复合响应。 Based on the data of climate, underlying surface and human activities in resent decades, this paper studied the changes of flood disaster formative environment in the Pearl River Delta. These changes include in the following aspects： Firstly, temperature and precipitation variability have significant increasing trend; Secondly, the river network system becomes simpler, and river-bed has been cut so deep generally and grows narrower than ever before; Thirdly, tidal fiat resources becomes smaller and smaller, and estuaries of the Pearl River Delta extend to the sea gradually; Finally, impermeable stratum area grows larger than before in the Pearl River Delta. Based on the hydrological situation of recent several heavy floods, this paper also analyzed the flood response to the change of flood disaster formative environment in the Pearl River Delta.

关 键 词： 气候变化 下垫面变化 人类活动 洪水响应 珠江三角洲

领　　域： [天文地球] [天文地球]