Study On Eco-economic Water And Soil Conservation Forest Benefit Evaluation And Model Design In Westen Liao Ning Province

This article separates forest hydrology function process into canopy interception, moisture resistance of litter, soil moisture content and soil anti-erosibility by the method of process-cut forest hydrology ecological affection based on lots of investigation on present water and soil conservation forest in Western Liaoning Province. At the same time, the research on soil improvement and economic benefit is done. First, the forest vertical interception is analyzed in the article. Result shows that surface cover degree is important factor to canopy intercepted rainfall and interception rate. Through analyzing litter hydrology ecological function in forest fields. The opinion is proved that 2cm and above is the thickness, which can effectively prevent surface runoff, restrain soil water evaporation and canopy splash erosion. Second, soil anti-erosibility and soil improvement benefit of forest in Western Liaoning province is analyzed by PeA, then 9 indexes of soil anti-erosibility are divided into 3 parts. Soil anti-erosibility in different exposition, slope gradient, slope position is researched and 6 indexes of soil improvement are separated into 2 parts. Then systemically analyze benefit of different stand types. The ecological benefit is comprehensively evaluated by Fisher determination analysis in 5 indexes of surface cover degree, thickness of litter, soil anti-erosibility, non-capillary porosity and slope gradient. Finally, the typical afforestation model of water and soil conservation forest in different site condition is brought up by comprehensively analyzing ecological benefit, economic benefit and soil improvement benefit of different stand types in Western Liaoning province.