Rainfall Interception By A Multi-scale Comparative Experiments And Retention Model With A Case Study Of Hailuogou Area

This study is based on the hydrological geology and forest hydrology theory.Through the analysis of multi-year precipitation, interception, stem flow data, studytheir inherent laws of Gongga forest area. Study on the different region, differentvegetation types in the tree trunk interception, on precipitation interception andretention time through the artificial rainfall experimental method. Use drying methodto study aeration zone soil water content. The purpose is to reveal the groundwaterhydrological significance of Gongga mountain forest area, study of differentvegetation types on the effect of rainfall interception, and discuss its interceptionmodel, can announce its important ecological significance. Combining with theexisting achievements, study on water circulation scale conversion of Gonggamountain area. The main research results are as follows:1)Better explain the mature coniferous forest, mature coniferous forest,coniferous and broad-leaved mixed forest, broadleaf forest litter on rainfallinterception.Conclusion in different area can meet the scaling and scale, and extendedto small watershed scale.①There is a linear relationship between different vegetation litter interceptionquantity and area:Mature coniferous forest I=3105.5S+1009.5R²=0.901Immature coniferous forest I=2567.5S+1009.5R²=0.825Mixed coniferous and broadleaf deciduous forest I=5015.4S+1009.5R²=0.93Broadleaf forest I=1934.5S+1009.5R²=0.8986②There is a power function relationship between different vegetation litter interception rate and area:Mature coniferous forest C=-0.364e^37.58lnSR²=0.6127Immature coniferous forest C=-0.311e^38.453lnSR²=0.5337Mixed coniferous and broadleaf deciduous forest C=-0.277e^41.95lnSR²=0.5555Broadleaf forest C=-0.205e^45.261lnSR²=0.51042)According to the different types of vegetation interception research, summedup the Gongga mountains in May litter interception models:In （I-WM）[1-exp（CPc/In-WM）]+E3)Different canopy interception models of Gongga mountain:Mature coniferous forest I_n=P_c-0.0103Ps1.9930-P_g-0.878L-0.46-3105.5S-1009.5Immature coniferous forest I_n=P_c-Pw-P_g-0.409L-1.46-2567.5S-1009.5Mixed coniferous and broadleafdeciduous forestI_n=P_c-0.0005P3.1143-P_g-0.351L-1.62-5015.4S-1009.5Broadleaf forest I_n=P_c-P_w-P_g-0.339L^-0.95-1934.5S-1009.5...