Abstract:The conception of water resource envi ronment is put forward, by which, the auther attempt to discover the serious water resource problems in the west region of China. According to the practice of water resource environment in the west region, the technical and policy countermeasures are put forward, it includes protecting sustainable space of water source, renewing and reconstructing the damaged water resource environment by ecological engineering, developing water saving irrigation agriculture, the first grade principle of sustainable eco-environment and ecological compensation mechanism.

Abstract:The ecosystem change of external forcing, course system, system output of ecosystem in the frame of conception model of the migrants resettled area in Three Gorg es reservoir area is analyzed. In typical watershed, Quxi watershed, the result of external forcing, submerge and migrant, is the resource change of slope cultiva ted lands, economical fo rest, vegetation, water, habitant etc. of the eco system, and the changes of demand for food supplies, energy resource and education. By the action of feedback mechanism, the system outputs are soil and water loss pricking up, biological diversity being destroyed, heavily soil degrading etc. . And then brings forward some countermeasures such as developing watershed management,resuming and rebuilding mountainous region ecosystem, streng thening research on reforestation countermeasure, to easeup the conflict between human and land and achieve the sustainable development.

Abstract:Based on the deg radation mechanism of eco-system, the eco-system degradation caused by the change of water resources in Hexi corridor is studied, and the relationship between the contrary succession of plant systems and environmental degradation is discussed. The basic thought of ecology restoring is put forward.

Abstract:The methods and approaches of soil and water loss evaluation models are analyzed. Meanwhile,taking Shenzhen city as an example, the comprehensive evaluation model is built . The examination analyses of the model are carried out with system of urban soil and water conservation in Shenzhen city. The model creates favorable conditions for urban soil and water lossestimating and forecasting .

Abstract:Shenfu-Dongsheng mine site is located in the passage of arid and semiarid zone. Based on the fragile eco-environment, coalmining and construction have brought out some new environment problems.Man-made debris flow problem is the most serious of them which caused by coalmining, construction of railway and highway as well as exploi ting stone. Because of the particularity of forming process of man-made debris flow, the watershed geomo rphy is very distortion. Throug hevery landform factors of watershed systema tically analyzed, the results show as follows. (1) The gully bed gradient takes conv exshape as the dominant, that is a unique form of man-made debris flow gully. (2) Regional area ratio is the largest in converge water region, and the watershed formation of fan-shaped make up 80 percent of the total sample gul lies, it is favorable to water concentration and a particular demand of motive power of debris flow in semiarid area. (3) The landform rugged coefficient of watershed is not suitable to olarge and the area of providing water for gully formation is larger in semia ridregigon than in moist region.

Abstract:The soil aggregate and micro-aggregate of fixed fertilization plots in Qia nxian county, Shaanxi province are studied. The results showed that the disparities were remarkable in content of soil organic,matter, the quantity and proportion of each grade of aggregate and micro-agg regate in different fertilization,levels. Compared with the contrast, raising the level of fertilization, soil organic matter, 10-250μm microag,gregate and > 0. 25mm aggregate increased constantly, and the quantity of < 10μm micro-aggregate had the decreasing trend. Soil coefficient of disperse decreased and that of the soil structure increased.Analysis showed that the content of organic matter was positively linear corelated to quantity of > 0. 25mm aggregate and 10-250 μm micro-ag g reg ate respectively, and was neg atively linear corelated to < 10 μm microag gregate. Raising fertilization, especially raising quantity of organic fertilizer or blending organic fertilizer and in organic one, it is benefited for forming the bigger diameter aggregate.

Abstract:The rainfall installation of simulated soil erosion experiment hall has been running well since it was finished in 1992. It is the best on the areas of adjusting range of rainfall intensity, the consistent degree of raindrop characteristics between a rtificial and natural rainfall, and degree of automatically controlling etc.thus play an important role in soil erosion experiment research. Based on the impo- rtant meaning of simulated soil erosion experiment, the desin evidence about some installations (including rainfall spray nozzle, water supply pipenet etc.), installation selection, and arrangement etc. is introduced briefly. Meanwhile, the basic characteristics of simulated rainfall are also explained.

Abstract:The characteristics of seasonal drought in low -hill red soil region are described. In order to delay the affection of seasonal drought, some synthetical agriculture technology and suggestions are provided. The results indicate that some agriculture technology, such as digging well at the foot of the low-hill, digging reservoir, building field safeg uarding forestry, contour farming, terracing, croprotation, cover and application of farmyard manure etc., are effective in increasing yield.

Abstract:The concept of the “ digital loess plateau (DLP)” is suggested. The necessity, the purposes, the targets, and the strategy of the DLP, and some issues, such as meta data, method of the data matching and integration, and the scaling, etc., have been discussed primarily. A framework of the DLP, including the data, the database structure, and the layers, etc., has been planned.

Abstract:Three new kinds of eco-materials, thei rconst ruction methods and examples are introduced, which are used with reference for study on domesticeco-material of rock slope. Else, some advices about slope ecoengine-ering for rock slope protection are given.

Abstract:According to the natural and economic characteristics in the Weibei dry plateau, the key technology and new way to increase production, i. e. high-efficient and optimized cultivation pattern are present . The results of three years experimental demonstration and popularization show that the production of wheat cultivated by the pattern increases by 62. 92% compared w ith CK, it is about 2176 kg /hm²;production of soybean after wheat harvesting (double cropping) increases by 100%, about 1 500～2 250 kg/hm², both with significant effects.

Abstract:The comprehensive harness in the small water shed, the construction of soil and water conservation system and some experiences on comprehensive harness in Pingyi county, Shandong province are introduced in terms of the water shed administration. The roles of the comprehensive protective system in local economic development and the eco-environment improvement are shown, which demonstrates the necessity and rationality of launching soil and water conservation in a small watershed

Abstract:The feature of the water resource and the implication of its utilization is analyzed. Through analysis of the factors on water resource sustainable utilization, an evaluation index system is set up, which includes the supply of water, technological level and management of water development, and comprehensive benefit. In the end, comprehensive index method is put forward.

Abstract:High efficient utilization of rain water resource is very important for the economic development in arid and semiarid areas where surface water and ground water are shortage. Based on the investigation on irrigated farming by harvesting rain water in Shaanxi province, the present situation and problems about the construction operation and maintenance of cistern, and the quality and utilization of rainw ater are pointed out. Furthermore, some measures and ideas on how to solve the problems and how to promote the development of irrigated farming by converging rain water are putforward.

Abstract:Minjiang valley is a fragile area in natural geography environment and forest ecological ecosystem according tolots of data of meteorology, geology, soil and hydrology, huge drop in topography, strong precipitation, easily eroded soil growing from granite, fragility to defend erosion in red soil area, water system of long handle sector and alternate with arrange canyon and basin vale benefit for collection water,and go against drain. The ability decline of defending soil and sluicing water, and hinder flood and flood detention for the degeneration of forest ecosystem. In consequent activity of people pick up water and soil loss, riverbed drive up, embankment fragility, ability of store flood water and row flood reduce. All of them make it snatur alcalamity (especially floodw ater) frequent .

Abstract:Soil erosion is a result of comprehensive effect of geographical environment factors. Due to an abundant rainfal land frequent rainstorm, and geographical characteristics of mountain and hills, the potential erosive dynamics of soil erosion is strong . The low resistant erosion ability of ground substance,especially in granite weathering crust and purple rock and its soil are the inner causes of severe soil erosion. The utilization of natural resource of mankind was increased due to characteristics of social and economic environment of the province. The unreasonable land utilization caused vegetation destroy, which is the key factor of soil erosion. The revegetaion on erosive slopeland should follow the succession rule of zonality and plant community and focus on the built of zonality forest system, and the local condition should be considered in developing harness, the measures of intercroping of green manure or pasture on orchards should be advocated to control soil erosion and to achieve the combination of fruit, pasture and animal husbandry to strength ecological environment construction.

Abstract:Vegetation measure is one of the most useful and basic methods to harness the typical soil and water loss area of Gua ngdong province. As a case in Shima small watershed, the benefits of different plants on reduction of water and sediment yield were compared. The result showed that the plant colonies of different type and stucture brought different benefits. The influence of rain to the different reduction benefits was also analysed. The synthetical benefits of soil and water conservation after harness in Shima small watershed are evaluated.