The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
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...
To monitor the land sandy desertification dynamic change accurately in Duolun, the desertification was classified and evaluated based on the land use point of view and the evaluation index system based on land use was set up. TM image was decomposed by linear spectral mixture mode and the vegetation component of TM image was amended by the high-resolution satellite image to extract the information...
Fuzzy mathematics method is used to evaluate the groundwater quality in Yang village. The groundwater quality of 18 villages belongs to V level water (GB/T14848-9 Quality standard for ground water) in the study area, where water pollution is very serious. Polluted area mainly includes the sandy soil region in northeast Yang village and east bank villages in western Beijing-Hangzhou Canal. Yinma village...
The drought is the most common natural disaster in the world, and the soil moisture content is one of the main indicators of drought monitoring. This study took the semi-arid region in northern Henan province as the study area and used Landsat-TM of 2008 remote image to set up the empirical model for getting the reflectance of the earth surface. The influence of vegetation on the pixel reflectance...
The main objective of this study was to make a pollution regionalization of soil heavy metals in A city, an area with rapid economic development in Yangtze River Delta of China. Therefore, the spatial distribution of soil heavy metals was firstly estimated by optimal space method using 126 data points and performed using ArcGIS9.2 software. The areas of different content grade were computed by overlay...
In this paper, remotely sensed landscape index analysis over 10 years, indoor and outdoor experimental analysis and statistical analysis were utilized to study a typical alpine wetland at Maqu County in eastern Qinghai-Tibet Plateau in China for the relation between landscape change and biodiversity. We investigated: 1) changes of alpine wetland vegetation diversity and biomass; 2) germination conditions...
According to climate, vegetation, geomorphology, the degree of the Kaschin-Beck disease and geology, hydrogeology, soil, the degree of original environmental transform as well as the difference of the disease, etc., the authors divided the east of Jilin province into three ecological environmental zones (A,B,C), compares the situation among three zones, then draws conclusions as follows: Kaschin-Beck...
The purple soil in hilly area in southern China is experiencing severe erosion. Understanding the effects of forest management approaches on soil quality is very important during the vegetation restoration. Three replicated plots of four forest stands with different forest restoration approaches, including natural secondary forest, plantations of Robur tree plantation (Lithocrpus glabra) (RTP), sweetgum...
This article describes a concise way to estimate litter decomposition rate in a regional scope; Meanwhile, we proposed a new method for evaluating the rate of single/mixed litter decomposition in a forest ecosystem.
Land degradation is an important environmental problem, it will become a threat to food security and the sustainable development of socio-economic systems, ultimately affecting the development of humans with global warming. Xinjiang is a key region in China, in which land degradation is very serious. Combed RS with GIS technology, based on the latest remote sensing data, analyzed the spatial distribution...
The five provinces (Yunan, Guizhou, Guangxi, Sichuan, Chongqing) in the Southwest of China experience a long drought, which has no effective precipitation in most parts of Yunnan from September 2009 to April 2010. The drought is the largest in the Yunnan province in the passed one hundred years. This paper uses MPI (Microwave Polarization Index) to retrieve soil moisture, and the comparison and analysis...
In order to acquire more accurate crop yield information, the global optimization algorithm SCE-UA was used to integrate leaf area index derived from remote sensing with crop growth model EPIC to simulate regional summer maize yield and field management information in Huanghuaihai Plain in China. The results showed that the mean relative error of estimated summer maize yield was 4.37% and RMSE was...
As the largest in-land fresh water lake of China, Poyang Lake is also an important wetland in the world. However, the lake area, like the other lake areas of China, has being faced series of ecological and environmental problems and challenges, such as soil erosion, land desertification, drought and flooding disasters, farmland being soiled, pollution, invasive species, loss of biodiversity, and more...
Environmental quality of reclaimed soil is a key issue in the process of land construction and ecology rehabilitation. Taking Xinzhuangzi and Datong reclamation district for example, according to Nemerow Pollution Index Method, results show that: In all 30 soil samples, 28 samples are I class level, clean; 1 sample is II class level, slightly clean; 1 sample is III class level, polluted slightly....
This paper presents a method (drought index) to monitor the drought process in China. The method based on the relationship between drought and soil moisture change. Although the absolute value of soil moisture from AMSR-E land product is not accurate enough, but we can use the soil moisture change information in the temporal scale. The soil moisture product of AMSR-E from 2002 to present is used to...
The Topographic Wetness Index (TWI) is frequently used to simulate the soil moisture conditions in a watershed quantitatively, and it is the most commonly used indicator for static soil moisture content as well. So it plays an important role in the research of soil erosion and distributed hydrological model in watersheds, etc. Additionally, the index was generally extracted from Digital Elevation...
Karst rocky desertification is a kind of serious land degradation. And it is the third-largest ecological and environmental problem compared with China northwest desertification and soil erosion in loess plateau. Besides, fractal geometry theory is mainly used to explore the regularity, hierarchy and scale invariance hide in complex natural phenomena. And it is a new research angle that the fractal...
This paper discussed about the process and method of sustainable land use spatialization. Divide the indicator into statistical indicator and geospatial indicator. Take Guyuan County, Kangbao County and Zhangbei County in Bashang region of Hebei province, China as examples, build a sustainable land use evaluation indicator. Evaluate the sustainable land use in Bashang region in 2003; the result can...
Remobilization of fixed or semi-fixed sand dunes is the main process of desertification, which is sensitive to climate change. We analyzed 35-year temperature and precipitation data at three meteorological stations in Otintag Sandy Land, and calculated sand dune mobility index by employing the method suggested by Lancaster. In the last 35 years, the regional temperature tended to increase, whereas...
Contents of heavy metals in six vegetable species and the corresponding rhizospheric soils around a lead-zinc mining and smelting plant in Nanjing, China were investigated to assess the possible risks of heavy metal posed to human health through food chain and to discuss the relationships of heavy metals contents in vegetables and the corresponding rhizospheric soils. Compared to national sanitation...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.