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To detect responses of masson pine to the acid rain based on different soil conditions, monthly average pH and NDVI were obtained from precipitation acidity and GIMMS/NDVI data from 1992 to 2006 in China based on both acidity levels and soil critical load of acid deposition, then used to analyze inter-annual variation by the improved sinusoidal fitting and linear regression analysis. Our results showed...
The copper mine tailing dam in Tongling city has highly potential environment risk. To recognize the underground distribution of Cu in the mine tailing dam, nine profiles were excavated and surveyed in the central area of the deserted copper tailing dam. Soil samples from different layers of each profile were collected separately. The copper content in the tailing dam exceeded the toxic threshold...
As the key component of the ecosystems, vegetation is the main receptor of acid pollution. The present study aims to reveal influence of acid deposition on vegetations in subtropical China through comparison inter/inter-annual and seasonal variations of NDVI in 11 eco-regions between severe acid rain region (SR) and normal acid rain region (NR), based on the SPOT/VGT_10Day_NDVI and precipitation pH...
In order to research the shallow landslide hazards of soil slopes in seasonal frozen regions, the critical depth analysis methods are put forward. Continuum explicit finite difference method is applied in the research. Considering the temperature, gravity and seepage force, the soil slope solid model of seasonal frozen regions is established. As the outside temperature alter from −5°C to 10°C, then...
Water pollution in Taihu Lake has become one of the most serious environmental problems that draws public attention and needs to be solved as soon as possible. It was well known that forest could play an important role to control soil & water erosion, uptake extra soil nutrients as well. However forest coverage is rather low and woodlands are extensively managed in the headwaters region. Thus...
Soil is an important parameter on water quality, and plays a key role in water quality evaluation, especially for inland water. Many remote-sensing methods have now been developed to reverse soil concentration. However, in natural water, the existence of chlorophyll-a affects the soil concentration reverse precision. In order to remove the effect of chlorophyll-a, an experiment is designed in this...
Normalized Difference Vegetation Index (NDVI) and Normalized Difference Moisture Index (NDMI) were compared for an oasis ecosystem in an arid environment. Both indices were computed from 500 m spatial resolution Moderate Resolution Imaging Spectroradiometer (MODIS) reflectance data (8-day composite from 193 to 200) for the period from 2001 to 2008. NDMI were positively correlated with NDVI. R2 values...
According to the basic idea of fluid-solid coupling theory, combining percolation mechanics with rock-soil mechanics and considering threshold pressure gradient and fluid-solid coupling character of low permeability reservoirs, a numerical model is established, which can describe the fluid-solid coupling character in saturated deformable low permeability reservoirs and can be solved by coupling numerical...
In this work, a reliable method for simultaneous determination 15 organochlorinepesticide (OCP) residues (alpha-HCH, beta-HCH, gamma-HCH, delta-HCH, hexachlorobenzene, heptachlor, aldrin, alpha-chlordane, gamma-chlordane, dieldrin, endrin , O,P'-DDE, O,P'-DDT ,P,P'-DDT and P,P'-DDD) in soil was reported. The method was based on sonicated extraction with a mixture of acetone and petroleum ether (50:50,v/v)...
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