477 Result(s)
within
**ao** Xu
Earth Sciences
Environmental Science and Engineering
Geochemistry
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Article
Risk assessment of land subsidence at Tian** coastal area in China
Risk assessment and zoning are very important to risk management. In this study, a land subsidence risk assessment index was proposed based on the Disaster Risk Index. The cumulative subsidence volume, the lan...
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Article
The influences of mining subsidence on the ecological environment and public infrastructure: a case study at the Haolaigou Iron Ore Mine in Baotou, China
The scope and extent of mine subsidence caused by exploitation of metal ores are usually low. However, in some cases, owing to such factors as special geological conditions in ore body, backward mining technol...
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Article
Modeling transfer of heavy metals in soil–rice system and their risk assessment in paddy fields
Many studies have been conducted on model transfer in soil–plant systems. However, relatively little information is available on modeling metal transfer in soil–rice system and associated risk assessment in re...
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Article
Quantitative spatial characteristics and environmental risk of toxic heavy metals in urban dusts of Shanghai, China
Associated with the rapid urbanization and industrialization, most of the urban parks and recreational areas in Shanghai are built close to major roads or industrial areas, where they are subject to many poten...
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Article
An ERDAS image processing method for retrieving LST and describing urban heat evolution: a case study in the Pearl River Delta Region in South China
A spatial-temporal model with Model Maker tool is designed to retrieve Land Surface Temperature (LST) and to describe the changes of urban heat island, as well as urban development. Spectral Radiance, Brightne...
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Article
Heavy metal contamination of cultivated wetland soils along a typical plateau lake from southwest China
Topsoil (0–20 cm) samples were collected from four cultivated wetlands including Northern and Western Fields (about 30-year tillage), and Southern and Western Fields (about 20-year tillage) along the Yilong La...
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Article
Heavy metal pollution and assessment of the tidal flat sediments near the coastal sewage outfalls of shanghai, China
Zn, Cu, Cr and Pb concentrations of the sediment collected from three tidal flat sites of Yangtze estuary were investigated in October 2003. Results showed that the average concentrations of heavy metals in th...
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Article
Analysis of soil erosion characteristics in small watersheds with particle swarm optimization, support vector machine, and artificial neuronal networks
Sand production by soil erosion in small watershed is a complex physical process. There are few physical models suitable to describe the characteristics of the intense erosion in domestic loess plateau. Introd...
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Article
Assessing the vulnerability of social–environmental system from the perspective of hazard, sensitivity, and resilience: a case study of Bei**g, China
Despite a recent increase in the number of vulnerability analyses there has been relatively little discussion of vulnerability assessment of social–environment system, especially when they face multiple hazard...
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Article
Porosity change model for watered super absorbent polymer-treated soil
Drought is a great concern in agricultural production, because it restricts normal plant growth, brings about enormous economic loss and deteriorates ecological environment. Proper use of super absorbent polym...
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Article
Waterlogging risk assessment based on land use/cover change: a case study in Pudong New Area, Shanghai
Waterlogging induced by torrential rain or typhoon in urban areas due to rapid urban development and land cover changes has been a global hotspot and a potential risk affecting urban habitant lifelines and saf...
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Article
Atmospheric dust aerosols over the Eastern Pamirs: major element concentrations and composition
This study measured the major element concentrations and compositions of atmospheric dust aerosol samples collected weekly for nearly 2 years at Mt. Muztagata, a remote and high-elevation site (38°17′N, 75°01′...
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Article
Influence of continuous rainfall on surrounding rock-initial support system of shallow decomposed-rock tunnel
A case study is presented to identify the influence of continuous rainfall on surrounding rock-initial support system of shallow decomposed-rock tunnel. From March 21 to April 29, 2006, rainfall with intensiti...
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Article
Photosynthesis and water use efficiency of Populus euphratica in response to changing groundwater depth and CO2 concentration
Changes of stomatal conductance (g s), net photosynthetic rates (P N) and water use efficiency (WUE) were investigated in Populus euphratica grown on sites with dif...
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Article
Isolation and degradation ability of the DDT-degrading bacterial strain KK
A 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (DDT)-degrading bacterium was isolated from soil samples that had been enriched with DDT over a prolonged period of time; these samples were collected from the s...
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Article
Hydro-salinity balance and mobilization in oasis irrigation areas at two different scales
Decades of intensive irrigation of farmlands in the oasis irrigated areas of **njiang, Northwest China has caused secondary salinization of vast areas of land since the mid-1980s. Based on the systematic analy...
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Article
Land subsidence in Tian**, China
Land subsidence has been affecting Tian** for the past 50 years. It leads to comprehensive detrimental effects on society, the economy and natural environment. Overpum** of groundwater is the main cause. In...
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Article
Impacts of human activities on the hydrology of Baiyangdian Lake, China
Baiyangdian Lake is the biggest natural freshwater wetland in North China Plain. It provides important ecosystem services such as water regulation and supply, reed production and biodiversity protection. Baiya...
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Article
Influence of soil and water conservation measures on reducing in frequency of hyperconcentrated flows in the Wudinghe River basin
Based on data of SSC, precipitation, sand-dust storms and area of soil and water conservation, a study has been made of the temporal variation in the frequency of hyperconcentrated flows in the Wudinghe River,...
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Article
Multiple scenario analyses forecasting the confounding impacts of sea level rise and tides from storm induced coastal flooding in the city of Shanghai, China
Shanghai is physically and socio-economically vulnerable to accelerated sea level rise because of its low elevation, flat topography, highly developed economy and highly-dense population. In this paper, two sc...
