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The purpose of this paper is to study the spatio-temporal changes of cultivated land and driving factors in Shandong Province. The temporal change was based on the economical statistic data from 1952 to 1993. Economical statistic data included gross cultivated land, population, foodstuff output per capita, Gross National Product, national income, total value of agriculture and industry product. The...
Heavy metals are important factors influencing plants' growth and physiology, sustainable agriculture and ecological environment. Heavy metal research is thus an important topic in environmental sciences for soil eco-toxicological diagnosis and ecological risk assessment. In this chapter, Transmission Electron Microscope (TEM) was used to investigate the damage of wheat seedlings caused by lead and...
Huaihe River Basin is an area where flood and waterlogging disaster happened very frequently. The disaster has mad adverse impacts on the region's economic development. Precipitation-runoff processes are correlated with catchment's hydrological conditions. The estimation of soil wetness variations is of considerable importance to improve the reliability of flood warning. Passive microwave data present...
The urban environment quality is of vital importance as the majority of people now live in cities. Due to the continuous urbanization and industrialization in many parts of the world, metals are continuously emitted into the urban environment and pose a great threat on human health. In this study, a total of 38 soil samples were collected from Weinan industrial urban areas, NW, China, and the concentrations...
Many satellite images with thermal infrared band can be used to obtain the ground surface temperature, but it is difficulty to get the underground soil temperature, which is a function of time and depth. The objective of this paper is to provide a solution to convert the ground temperature derived from RS image to the soil temperature at a given depth and obtain the soil temperature difference at...
As one of the most important variables of topography, the quality of extracting slope length has a serious effect on soil and water conservation, soil erosion and environmental assessment studies. Based on the principle of data independent DEM interpretation analysis method, this paper quantitatively studies the error spatial distribution of slope length which is extracted from grid-based Digital...
The characteristic of water transport and loss in a direct-seeded paddy field, Danyang Region at upstream of Taihu Lake Basin, was studied under local traditional field water management using Hydrus-1D model. Results show that the drying/wetting boundary condition on soil surface was well simulated by using divided stress period method in the Hydrus-1D model, and the estimated hydrodynamic parameters...
Soil sample data collected from 2006 and 1982 were linked with land use attributes derived from satellite images and analyzed by using traditional statistics, geostatistics and GIS. Traditional statistics showed that the mean value of each soil nutrient was very low. The mean value of TN, TP in 2006 were significantly lower than those in 1982 and other soil nutrients didn't have statistically significant...
The index system was constituted in this paper using meteorological data, vegetation data, soil data and socio-economic statistics, and then eco-environment vulnerability was evaluated. Based on the powerful spatial analysis function of GIS, using 100m×100m real area as basic unit, the eco-environment vulnerability of Baishan Region was evaluated with the Analytical Hierarchy Process and Weighted...
Soil contamination is an enormous problem in China and severely threatens environmental quality and food safety. Desorption of contaminants from soil is a critical process controlling the availability of soil contaminants and thus the risk associated with contaminated soil. All the currently adopted desorption models greatly simplify desorption by assuming that desorption is a simple reverse of adsorption...
In this paper, "RS", "GIS" and "GPS" are integrated as the "3S" technology, which is widely applied to the construction of the dynamic monitoring system of soil erosion. This system is used to monitor the soil erosion in watershed and pre-warn possible problems hidden in the process of land cultivation, so that measures can be taken to prevent or solve such...
In order to study the soil moisture of peanut fields in the region of red soil and to develop water-saving agriculture along gentle slope upland in southern China, the numerical modeling of soil moisture dynamics was established, based on Richard movement equitation. The simulated soil moisture was in good agreement with measured data. Modeling analysis showed that the soil hydraulic parameters are...
This paper presents a brief synthesis of the information obtainable from remote sensing data and how they can be used to design the land degradation assessment model. The use of the Modified Soil Adjusted Vegetation Index (MSAVI), Soil Wetness Index (SWI) and Land use derived from the Landsat Thematic Mapper (TM) were derived for detection and assessment of land degradation in Guyuan County, Hebei...
Taking the crop lands around Xinjing village in the upstream reaches of the Bi River as study area, this paper measured the contents of four heavy metals (Pb, Zn, Cd and As), evaluated the pollution degree using the pollution index and interpolated their spatial distribution by Kriging method in ArcGIS. The results indicated: (1) only the content of Cd exceeded background levels of soils, which was...
It is well known that microwave emission from soil is very well correlated to its moisture content. One experimental area near Changchun was selected for the research of retrieval of soil moisture from C-band microwave radiometer. Measurements were carried out on bare smooth soils, bare soils with ridge, dry grass covered soils and standing straw covered soils with different view angles. Soil moisture...
This study investigated the effect of leachate DOM on the adsorption of Cu, Cd, Pb and Zn in the typical cinnamon soil in Northern China. The adsorption experiments were conducted under the conditions of isotherm at 15, 25 35°C and at various acidities (pH=5-9). The results revealed that the process of soil adsorb these metals is accord with the adsorption isotherm formula of S=KCN and S=SmC/(C+1/K)...
Active microwave remote sensing techniques in the soil moisture inversion take advantages of their measurement on any weather conditions, strong capacity of penetrating the soil and their sensitivity to soil moisture content. This paper presents a method to estimate the soil moisture using ENVISAT ASAR data over Jianghan plain in China. First of all, water-cloud model is used to eliminate the impact...
Simulation of soil salinity is the basis for effective control of salinization and utilization of regional salinization lands. This paper was to simulate dynamic of soil salinity with pedo-transfer functions (PTFs) and geographic information system (GIS) technology based on facile variables in Yellow River Delta. Simulating models were derived from field observation data of soil salinity, EC and water...
The north most representative cinnamon soil was selected as the tested soil. The study considered the effect of dissolved organic matter on migration of Cu, Cd, Pb and Zn in soils by column experiment. Migration and transformation model was built which based on the soil solute transport model. It is important for the prediction of the temporal and spatial distribution of pollutant, and help to prevent...
Soil erosion is a serious geo-environmental issue causing land degradation in China. Developing new techniques based on remote sensing data to assess soil erosion will assist in the comprehensive treatment of environment and the sustainable management of soil resources. In this paper, land cover and Normalized Difference Vegetation Index (NDVI) were derived from Landsat Thematic Mapper (TM) images...
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