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In the paper, some relative research theory and calculation methods for the river ecological basic flow both at home and abroad have been summed up, and then, considering the actual conditions of Sushui River, the function of the river reach is determined. The ecological basic flow of the river in different periods has been quantitatively researched with Tennant and the minimum monthly average flow...
In recent years, researchers pay increasingly attention on river ecological restoration at home and abroad. According to the practical situation of Tianjin Airport Economic Park river water environment and inter-external experiences, several ecological techniques, such as phytoremediation, artificial aeration and ecological riverbank, were adopted to river ecological restoration. And related operation...
Currently, urbanization has entered a stage of rapid growth in China, the environmental pollution and ecological destroy of cities are becoming more and more serious day by day. The work field of city planning and design is beginning to expand to undertake a task to improve living and ecological environment due to paying more attention to afforesting and ecological construction. Under the new background...
The indicator of hydrologic alteration (IHA) and coupled with the range of variability approach (RVA) are usually used to evaluate the alteration of the long-term hydrologic flow regime for instreams, which is widely recognized and applied both in China and abroad. This study is intended to assess the hydrologic regime alteration of Hanjiang River induced by Danjiangkou Reservoir. In which, the record...
Pearl River Delta is an export-oriented and rapidly urbanized region which is closely integrated with the global economic system. A preliminary conclusion was obtained based on the analysis of the present regional planning system of the Pearl River Delta. There was a mismatch between the two parallel subjects of the regional traffic network and the eco-environment protection. Three improvement measures...
The research on relationships among terrain, climate and vegetation is a main topic of ecological geography. Taking the moderate resolution imaging spectroradiometer based enhanced vegetation index (MODIS-EVI) and Parameter elevation Regressions on Independent Slopes Model (PRISM) data as the indices, we analyzed the spatial heterogeneity of vegetation in southern Yunnan province of China and its...
Wuhan city is the core city of Wuhan city circle and the major city of the Yangtze River, and the change of water have attracted great attention. Using the techniques of "3S" and landscape ecology, based on 1991 and 2009 Landast TM remote sensing image, integrating with the change of water modeling, transform matrix, the shift of gravity centers and landscape pattern analysis software Fragstats3...
Payment for watersheds services (PWS) is an important instrument of watersheds protection and management, which can transform fortune and reduce the inequity of environment and development between the upper reach and lower reach. Both government and market play a key role in the course. Based on case study of Jinhua River, the analysis on the payment mechanism and modes of environmental services and...
We choose main streams of Irtysh River and Ulungur River as river corridor and divide buffer strips at rate of 5 km from each riverside according to buffer strip analytic procedure, whose buffer strips are 10 km, 20 km, 30 km, 40 km, 50 km and > 50 km wide respectively. Subsequently we calculate and analyze index of main landscape pattern in terms of landscape and patches so as to reveal radiation...
The Three Gorges Reservoir is one of the largest water conservancy and control projects in the world. After the accomplishment of the project in 2009, a 30-meter high water-level-fluctuating zone will appear along the banks. The WLFZ is a seasonal humid ecosystem . The distributed features and useful values of WLFZ are explored according to the program of water storage in the Three Gorges Reservoir...
A risk assessment for water shortage is constructed to analyze the carrying capacity of water resources in Sheshui River watershed, China. It is based on the information of present economic development. There are several serious environmental problems which might cripple the development potential in Sheshui River watershed. Risk assessment results are used to analyze the carrying capacity of water...
Ten sites along the XiJiang River (WuZhou section), China were sampled to evaluate the copper (Cu), Zinc (Zn), lead (Pb), cadmium (Cd), and chromium (Cr) concentrations in sediments. The order of total metal concentrations in sediment samples was found to be Zn>Cu>Cr>Pb>Cd. The approach of Hakanson potential ecological risk index was used for the ecological risk assessment. Compared to...
We investigated the problem of river's Minimum Ecological Water Demand (MEWD) in Chinese mountain area on the premise of protecting the river hydrobiology's habitat and scientific operation of the reservoir hydropower station project. This paper uses Wetted Perimeter Method to determine the MEWD of the downstream of Maojiahe Reservoir dam, and compares the results from Tennant Method with that from...
Froude number expresses the combined effect of stream channel roughness and overall bend curvature (which slow down water velocity) plus the driving gravitational force that results from stream gradients. Through the research of Froude number at bend transitional shoal in Yangtze River, give a hydraulic condition in distribution of habitate patches.
Taking Futouhu which is the forth largest lake in Hubei Province as the study object, based on RS and GIS technologies, using the Landsat TM remote sensing images in 1991 and in 2005 as well as local chronicles as basic data resources, combined with field surveys and GPS positioning, the data on the dynamic changes of the area and the types of Futouhu wetland from 1991 to 2005 were obtained, and then...
We obtained four phases of land cover spatial data sets by interpreting MSS images of middle and late 1970s and three phases of TM images of late 1980s, 2004 and 2008 based on field investigation in Three Rivers' Source Region. We analyzed the temporal and spatial characteristics of land cover and macro ecological changes in Three Rivers' Source Region in Qinghai-Tibet plateau since middle and late...
Land use and land cover play an essential role in the process of land-atmosphere interaction, and their changes influence regional climate in complicated ways. This function is also regarded as a more important driving force in an arid area, where vegetation changes will greatly alter energy and water distribution at watershed scale, and further influence ecological balance and agricultural production...
Natural wetlands are the largest land-based natural sources for methane (CH4) emissions. China's natural wetland area accounts for about 4% of the area of the natural wetlands worldwide. Based on the data of global lakes and wetlands, in this study we conducted modeling work of CH4 emissions from natural wetlands in China by using terrestrial ecosystem model (TEM) of the 1995-2005. The results show...
Studying the services value of oasis ecosystems in arid middle reaches of the Heihe Oasis is significant for understanding the development and evolution, revealing the maintaining mechanism of oasis security, and promoting the resources and environment sustainable development of this area. Based on the data of landsat TM image in the middle of Heihe River Basin acquired in 2000 and 2006, land use...
The fast urbanization in Chongqing has had a great impact on the environment and resources. The water resource has been recognized as one of the key elements to the sustainable development of this region. This paper presents a method of predicting the regional Water Resource Carrying Capacity (WRCC) using the supply-demand balance model. The method predicts that the WRCC of Chongqing is from 110 million...
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