Soil water carrying capacity for vegetation: A hydrologic and biogeochemical process model solution

CORC > 地理科学与资源研究所 > 中国科学院地理科学与资源研究所 > 历年回溯文献

	Soil water carrying capacity for vegetation: A hydrologic and biogeochemical process model solution
	Xia Y. Q. ; Shao M. A.
	2008
关键词	Biogeochemistry Growth kinetics Mathematical models Soil moisture Vegetation
英文摘要	The research for a maximum stand density that maintains sustainable development is necessary in arid and semi-arid areas where the conflict between limited soil water storage and the need for more plants in improving environmental quality almost always exists. However, the quantification of the research is not easy since it requires insight interpretations of the effects of plant density on soil water storage and soil water stress on plant growth. Such quantification is incomplete with current empirical methods or physical models because the dynamics effects of soil water stress and its feedbacks are not included. This paper presents a physically based model of soil water carrying capacity for vegetation (SWCCV). The model build on the concept of an equilibrium adjustment of vegetation growth to soil water dynamics, by iterative calculation between hydrologic and biogeochemical processes that account for the interactions between the limiting effects of soil moisture on photosynthesis and evaporative demand on soil water. It is capable to calculate the maximum plant density at any given initial conditions (site-specific data, vegetation, weather, and etc.) through hourly, daily and yearly cycles. Exploratory simulation to evaluate the model against results from previous studies for two sites indicated that the predictions by the model had good agreement with measured soil water contents in each layer, LAI and NPP for plants. Under the same initial conditions the predicted soil water carrying capacity captured well the soil water difference between two sites in terms of controlling vegetation density. Overall, the SWCCV model is capable in terms of predicting soil water carrying capacity, providing a new approach for understanding soil-vegetation interactions and making recommendations for better management of vegetation construction in arid and semi-arid areas. © 2008.
出处	Ecological Modelling
卷	214 期:2-4 页:112-124
收录类别	EI
语种	英语
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/24495]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Xia Y. Q.,Shao M. A.. Soil water carrying capacity for vegetation: A hydrologic and biogeochemical process model solution. 2008.