Carbon storage in desertified lands : a case study from North China
Arid area ; Biogeochemistry ; Carbon cycle ; Carbonate ; China ; Desertification ; Greenhouse effect ; Northern China ; Soil
of China, total stored carbon, including carbonate carbon, is 1,8-fold more than organic carbone alone. The carbon released through land desertification in China may be an important factor affecting changes in concentrations of greenhouse gases worldwide.
Field water surplus and deficit of major crops in dryland of northern China
Agroclimatology ; Arid area ; China ; Climatic data ; Crop ; Evapotranspiration ; Irrigation ; Northern China ; Precipitation ; Soil properties ; Water ; Water balance ; Water needs
Based on measurements of soil and crop characteristics and mean climatic data (1950-1980), this paper discusses field water surplus or deficit and its pattern of major crops in dryland of northern China, aiming to provide a scientific basis
Origin of eolian sand mobilization during the past 2300 years in the Mu Us Desert, China
Aeolian features ; Aeolian transport ; Archaeology ; China ; Desert ; Drought ; Dune ; Heavy minerals ; Holocene ; Human impact ; Land use ; Model ; Northern China ; Sand ; Sedimentology ; Stratigraphy
in drought-prone and sensitive regions like northern-central China.
A GIS-based mapping method on distribution of critical Ecological Situation in China
Agricultural land use ; Applied ecology ; China ; Geographical information system ; Human impact ; Land use ; Soil degradation ; Thematic mapping
Based on analysis of the characteristics of critical Ecological Situation in China with the principle of choosing index, a set of indices on the Ecological Situations in China has been brought out, and the mathematical models for each index has been
created. With GIS, and data base management system, this paper classifies each index, calculates their weight by county-level unit, and colligate them into a holistic map of the Ecological Situation in China. Analysis from the map indicates
Origin of the red earth and gravel deposits in Nankou piedmont, northwestern Beijing, China
Beijing ; Chemical erosion ; China ; Clay mineral ; Geochemistry ; Microstructure ; Mudflow ; Palaeo-environment ; Palaeoclimate ; Palaeogeomorphology ; Piedmont ; Slope deposit
Analytic results of the mechanical and chemical composition, clay minerals, sedimentary structures and microtextures of the read earth and gravel deposits in Nankou piedmont, northwestern Beijing, China, suggest that the deposits have nothing to do
Sediment yield on a devasted hill in southern China : effects of microbiotic crust on surface erosion process
Biogenic process ; China ; Duricrust ; Forest ; Human impact ; Jiangxi ; Rill wash ; Sediment budget ; Soil erosion ; Vegetation degradation ; Watershed
In order to clarify the surface erosion processes in one area of devasted hills in southern China, the AA. measured the sediment yield and surface erosion depth in terms of catchment scale, and carried out in situ sprinkling experiments, focusing
China ; Democracy ; Economic growth ; Economy ; Hong Kong ; Legislation ; Political geography
Hong Kong is supposed to be ruled under the Basic Law of the British magistrate legal system for 50 years after June 30, 1997. At first there was a honeymoon period in which almost nothing seemed to change in Hong Kong under China. But the Asian
financial market crisis of 1998 has weakened the Hong Kong economy. Nevertheless, Hong Kong will remain the major business and export center of China for may years to come. Of greater concern is the protection of democratic ideals and individual freedoms
An application of canonical correlation analysis in regional science : the interrelationships between transport and development in China's Zhujiang delta
China ; Correlation ; Economic indicators ; Guangdong ; Living standard ; Methodology ; Regional development ; Regional economy ; Regional science ; Spatial economy ; Spatial structure ; Transport ; Zhejiang
Atmospheric dynamics ; China ; Desertification ; Dust storm ; Environment ; Environmental management ; Human impact ; Impact ; Land use ; Northern China ; Over-grazing ; Wind ; Wind speed
Sandstorm is a frequently occurred disastrous weather in northern China. The increasing occurence frequency recently, especially sandstorms with high intensity in the spring of 2000 have caused great loss to national economy. However