漓江上游典型植被蓄水-释放机理及水文响应

项目名称： 漓江上游典型植被蓄水-释放机理及水文响应

项目编号： No.41261006

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 李海防

作者单位： 桂林理工大学

项目金额： 50万元

中文摘要： 探究森林植被与水文过程的相互关系，加强水文预测与水文调控，是森林水文学的重要研究内容。水是漓江山水景观的"灵魂"，但漓江是"雨源补给型"河流，丰、枯水季节径流相差悬殊。根据前期研究，漓江上游森林植被蓄水能力强，能有效迟滞洪峰，缓解旱季缺水的关键在于蓄水的释放调配。为此，本项目拟以漓江上游4种典型森林植被为研究对象，利用"黑箱-水量平衡原理"，比较不同植被类型的林冠层、凋落物层和土壤层在降雨期间的蓄水过程，以及降雨后期蓄水的释放过程,分析不同降雨等级和时间序列下蓄水-释放过程规律，并进行回归模拟和时间序列分析；探寻影响蓄水-释放过程的主导因子；耦合蓄水-释放过程与河川径流水文响应，提出有利于提高森林植被蓄水和加快枯水期蓄水释放的经营设想。本研究对深入了解森林植被蓄水-释放机理，缓解漓江流域枯水期径流不足的矛盾，保护漓江这一珍贵旅游资源和促进地区经济的可持续发展，具有重要的理论和实践意义。

中文关键词： 森林水文；蓄水-释放；水文响应；漓江；景观

英文摘要： The relationship between forest and water resources has been a main problem in forest hydrology studies, which is also an important content for hydrological prediction and regulation. Lijiang River was a core mountain-water scenic spot in Guilin. Precipitation in Lijiang river basin was abundant, but its distribution of the year was irregular and rainfall mainly happened in rainy season. Our previous studies showed that the forest in upper reaches of Lijiang River had high water-holding capability and the time delay effect of flood peak was obvious. The key approach for solving the problem of water shortage is to enhance the regulation of water storage-release in forest vegetation. Using "Black box-Water balance" theory, an investigation on water distribution among canopy, litter and different soil layers in four typical vegetation will be conducted in this project, in which we focus on the mechanism of water storage during the rainfall and water release after the rainfall; We planed to simulate water storage-release processes along precipitation gradient and time sequence, determine the main impact environmental factors, discover the relationships between water storage-release processes and response of river runoff, and put forward valuable forestry management strategy. This research may help us better understa

英文关键词： Forest Hydrology；Soil water storage-release；Hydrological response；Lijiang River；Landscape