landform analysis
1.Thirdly,a state of the art and feasible algorithm is implementd to achieve the coordinate adaption and landform adjustment after the full analysis of the different typical movement state on the trapeziform road, so by which a chanllegening goal is achieved that caterpillar tanker will get through the road with trapezium cross section in the vision simulation system.
4.Based on the analysis of satellite images of various periods, landform data and river channel transverse section evolution in the lower Yellow River, the characteristics of the river channel boundary condition changes at different location are clarified as middle flood channel flood transport width and area are evidently decreased especially for the main channel with comparison to 1950s, beach area that is unimpeded before become blocked because of road, irrigation channel constructed on it, and consequently intensify high edge of beach and lowering dyke and river.
5.Through the analysis on the effects from the different aspects in the equal elevation grids upon the solar shortwave radiation received by ground surface, it is indicated that the discrepancy of landform elements leads to redistribution of the heat and cold sources of the ground surface and affects the snowmelt runoff, and then the aspect estimation is also taken as an important input to be inset into the model calculation.
6.Based on the analysis and comparison of the effects of artificial forestation and grass plantation in Malian River basin before and after implementation of World Bank Loan Soil and Water Conservation Project, it is realized that the "high effect forest and grassland construction" is the best way of vegetation measure harnessing the Loess Plateau with sparse vegetation, fragmented landform by erosion, and severe soil and water loss.
7.Abstract: The authors discuss roundly source of loose earth fo r impact-deposit debris flow to develop taking pingchuan debris flow,one of the quite typical impact-deposit debris flows in southwest sichuan province，as an example in this paper. on the basis of detailed investigations in-situ,geotechn ial testing in Lab and theory analysis,all results indicate obviously that moder ate and bulky loose earth in giant debris flow situating in southwest sichuan mo untainous area are main institute,whose tribulation are consistent with landform s.Loose earth locating in mid-forepart catchment are quite unstable,so often be comes main source of loose earth of debris flow.Formation of loose earth is cont rolled principally by geologic and geotechnical environment while human actions is the secondary factor for loose earth to form.In many times,human actions prov ide loose earth through loose earth stability.
