项目名称: 塔里木河胡杨径向生长与水分关系研究
项目编号: No.41461045
项目类型: 地区科学基金项目
立项/批准年度: 2015
项目学科: 地质学
项目作者: 叶茂
作者单位: 新疆师范大学
项目金额: 55万元
中文摘要: 本项目以胡杨为代表的荒漠河岸林分布最为集中的区域之一塔里木河干流作为研究区,借助树木年轮学和生态水文学的基本理论和方法,选择胡杨径向生长与水分的定量关系作为主要研究内容,以河段为单元,分析河道径流量与地下水相互的转化关系并进而对胡杨生长的影响,从不同尺度系统研究河道径流量与胡杨径向生长量的关系,探讨胡杨生长对河道径流量变化响应的空间稳定性和时间滞后性;基于前一个基金研究成果,开展胡杨径向生长与地下水位变化时空差异性的实验研究,在考虑胡杨龄级、种群退化程度和地下水位条件的基础上构建地下水位与胡杨径向生长关系的定量模型,确定不同林龄胡杨径向生长的合适地下水位阈值区间;从水资源转化的角度分析胡杨径向生长对河道径流量和地下水位响应的生态机理,探讨胡杨年轮与水分关系的水文生物协变规律,力争在干旱区内陆河树木年轮与水分定量研究上做出有特色的研究成果。
中文关键词: 环境代用指标;树轮;相关分析;塔里木河
英文摘要: Based on the theory of dendrohydrology , this project discuses the relationship between the surface runoff and ring-width of Populus euphratica with the regard of Populus euphratica species. The response differences and hysteresis effect of Populus euphratica on the suface runoff in the mainstream of Tarim river are analyzed. Compared by the ring-width changes of Populus euphratica in different river channel, the spatial and temporal response characteristics of Populus euphratica on the groundwater level change are studied. the quantitative model of the relationship between groundwater and Populus euphratica are establised. The groundwater threshold for satisfy the growth of Populus euphratica is put forward.Used on the characteristics of river channel, the water discharge between surface runoff and groundwater is analyzed .The ecological mechanism of Populus euphratica on surface runoff and groundwater is discussed. The study results can provide theories reference and technical support for the quatitive reasearch for the tree ring and streamflow change in the arid areas.
英文关键词: environmental proxy indicator;tree ring;correlation analysis;Tarim river