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Wetlands are a special natural complex with transitional characters between water and land; they have both water and land ecosystem's characters. In this unique and multifunctional ecosystem, water is the most active factor which could not only influence plant growth, population distribution and soil formation, but also control the development and evolvement of wetlands together with thermal condition...
More and more debris flows were caused by human activities. Firstly its definition of human debris flows was set up, the correlation between the two objects was analyzed. It think that human activities destroy the ecological environment so that had effect on the Forming condition and the development of the human debris flows through the following three ways: changing the natural terrain, providing...
Yimeng mountain area is the typical rocky mountain areas of Northern China. The local soil with loose texture and easy to lose was developed from the gneiss and sandstone. A small watershed in Yimeng mountain area of Shandong Province was chose to make a preliminary estimate about soil erosion rates of natural soils and cultivated soils on sloping land using the 137CS tracer method and soil erosion...
LUCC research is the focus of the study of entironment change, according to statistical and survey data, land use survey data and TM imagines from 1982 to 2008, analyzed the dynamic changes of LUCC in ShangHuang experiment area during the last 27 years. Based upon which, the major driving forces that influence the changes of land resources are discussed. The results indicated that throughout the study...
Sandy desertification is defined land degradation characterized by wind erosion mainly resulted from the excessive human activities in arid, semiarid and part of sub-humid regions in northern China, especially in the oasis zone distributed along inland rivers or in the lower reaches of inland rivers in northwestern China. During the sandy desertification anthropogenic factors play an important role...
This paper preliminarily discusses land potential in regional land use based on the relative factors. In terms of system, predominance in a regional land quality, land circumstance and geographical location is called regional land potential. Among these factors, the geographical location is decisive factor to land potential. Land potential will follow the law of conservation of energy, that is, the...
Soil erosion which endangers the human survival and development has been an important environmental problem around the world for a long time. The complexity and diversity presents in Zhuxi Small Watershed which is one of the thirty typical monitoring watersheds in China. The information which include rainfall, slope, soil, vegetation and land use, was obtained by combining 3S techniques with field...
With steep slopes, high mountains, concentrated rainfalls and frequent rainstorms, the agricultural production and economic development of the Wen County, the southernmost county, also heavily damaged by 5.12 Earthquake, of Gansu Province in northwest China, are gravely constrained by serious soil erosion. To make effective soil and water conservation measures, quantitative evaluation of soil erosion...
This paper studies the present state of water and soil loss in the Hubei province. Chinese scholars have analyzed the causes of water and soil loss, and pointed out that both natural factors and human activities are the root causes for these losses. The associated natural factors include the landscape, soil, groundwater and precipitation. Since the climate in this area is subtropical monsoon, heavy...
The present conditions, causes of sandification and its impacts on the ecological functions of Xianghai wetlands have been studied. Results indicate that human irrational exploitation is the key cause of the sandification of the wetland. The ecological functions of the wetlands, for instance, in flood control, pollution filter, water purification, aquatic productivity, and habitat provision for a...
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