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China's Grain for Green Programme (GGP) is the largest ecological restoration programme ever implemented in a developing country, but the ecological effectiveness in its whole implementation region still remain uncertain. Based on the trend analysis of dynamics in ecosystem structure and service, we assessed the ecological effects before and after the implementation of the GGP in 1990–2010 by developing...
Three-North Shelterbelt Program (TNSP) has been implemented in China since 1978 to increase forest coverage, control soil and water loss, and improve environment. Monitoring ecological management could provide the effect of the program and form the information base upon which sound planning decisions were made. The paper monitored forest resources and soil erosion on one example of Zhongyang County,...
Currently, the problem of land environment is one of the most serious environmental problems in China. This article will analyze the following aspects to solve the problem of the existing land environmental to promote social development better.
Mountain areas provide essential ecosystem services and are water towers for people living in downstream. The paper elaborates the specific vulnerability contexts and situation of mountain people and their social-ecological systems, highlights the importance of mountain ecosystem goods and services for China's sustainable development. The basic requirements of ecological modernization in China's sustainable...
Spruce (Picea asperata) is a special species of China, it is the main tree building species of high mountains in Sichuan, and plays an important role in the restoration of degraded ecosystems in sub-alpine areas in western China. In this study, impacts of different rotation lengths on carbon storage over 480 years were simulated using the ecosystem Model FORECAST for spruce, FORECAST_SPRUCE. Four...
Impervious surface plays an important role in monitoring urbanization and related environmental changes. CBERS and HJ-1 satellite images were employed to impervious surface extraction. Xuzhou City, located in the northwestern of Jiangsu Province, China, was chosen as the case study area. Using linear spectral mixture model (LSMM) and multi-layer perception (MLP) neural network, all pixels were decomposed...
By analysis of the spatial distribution of heavy metals in surface soil in Fuzhou, we found the soil have been contaminated in different levels, especially for contents of Pb, Zn, Cr in all the sample points far exceeded Background value in soil of Fujian Province. Some pro-sulfur and pro-iron elements have similar properties, so their variation of contents show good correlation. The features of the...
It is an important engineering problem to evaluate the stability of deep-thick accumulation body in many hydropower stations in the west China. The deformation mode and production mechanism affects directly its stability. Take Mahe accumulation body in Lenggu hydropower station as example, the boundary conditions and deformation failure mode are analyzed in this paper. The mechanical strengthen parameters...
The study on the coupling relationship between the variation of soil erosion and geomorphological factors in watershed scale will contribute to the effectiveness of soil and water conservation. Based on soil erosion database, the topographic variations of soil erosion in watershed and the relationship between it with different geomorphologic factors were analyzed in the paper, with a case study of...
In order to study the vertical movement of soil water, two loess profiles were sampled in Weinan on July 22, 2007 and March 22, 2008. Oxygen isotope compositions of soil water from the two profiles were measured to reveal information about soil water vertical transporting amount in unsaturated zone. The result show that soil water moved upwards and the vertical transporting amount is about 6.89mm...
Based on field investigation and indoor analysis, distribution characteristics of four available trace elements, including Cu, Fe, Mn, Zn, in the terrace land in loess region, was studied. Results indicated that, these four available trace elements distributed unevenly across soil profile, and its variation coefficient was high, which reached medium and high level. Distribution trends of these four...
The saturated silt ground in this area which was exerted by seismic loads was simulated numerically by using FLAC-3D. Liquefaction in surface of powder foundation occurred less likely and with the increasing depth of foundation it occurred more likely. The density of soil in upper layer increased because of the role of dynamic compaction. And as density increased, the dynamic strength of soil in this...
In order to propose an effective method for the reclamation of sewage sludge, sewage sludge from three waste water treatment plants were sampled and analyzed. The results show that the digested sludge samples are alkalescent, and the undigested sludge samples are acidic. The moisture content ranged from 78% to 83%. The samples have plenty of organic matter, N, P, K, and the heavy metals are relatively...
The test site locates in the subsidence area of Panyi colliery, Huainan city, and flyash used come from Tianji power station. Three different covering thickness test fields are designed, including of 20cm, 30cm and 50cm. Indexes chosen are as follows volume weight, texture, moisture content, pH, organic matter, total nitrogen, available phosphorus and rapidly-available potassium. The variation of...
In order to investigate the fruit quality of tomato (Lycopersicon esculentum mill) affected by microenvironment and soil water and fertilizer, the field experiment was conducted in a greenhouse in Ansia research Station of Soil and Water Conservation, Chinese Academy of Science, Yan'an, Shaanxi province, China, from March to October in 2008 and 2009. The research results showed that soluble protein...
A thermophilic oil-degrading bacterial group, named KL6-3 was screened by means of enrichment culture from soil contaminated by heavy oil from Karamay of Xinjiang Oilfield. Its oil degradation rate was up to 48.6% at 45°C and oil concentration of 10g·L-1(data not reported). To evaluate biodegradation to petroleum polluted soil of the KL6-3, the soil samples collected from Karamay supplemented with...
The paper discusses the relationship of the forest cover rate and the quantity of surface flow of two typical basins in LuZhong mountain area in more than forty years. The result shows that : the increase of the forest cover rate, helps to the supply of precipitation to the ground water, and helps to slow down the drainage speed of the precipitation, reduce the flood peak flow in flood season in mountain...
This study was undertaken in Danjiangkou reservoir and the upper reaches, where the SWAT model was used to analyze the space distribution of non-point source pollution. The land-use pattern was interpreted by Environment for Visualizing Images Software (ENVI). The runoff and the sediment data series from 2001 to 2006 were collected to calibrate the parameters and validate the model. The calculated...
With the aid of the spatial analyzing technology, three periods land use data of the Longchuanjiang catchments have been obtained. Raster-conversion and cartographic algebraic operation were conducted of the land coverage data, using a complex method integrating GIS spatial analysis with traditional statistical analysis, to create a new GRID database. Based on the database, the effect of land use...
Pollution environment has important influence to soil physical property, however, the method and theory of pollution soil research are not mature. The paper states chemical reaction with pollution solution, inducing dissolve and deposit effect, which is the immanent cause of physical mechanic property of soil. The soil samples of Dalian region have been soaked in sulphuric acid solution and sodium...
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