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Land Degradation Evaluation in North Hebei Province Based on Remote Sensing and GIS
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作者 Yuan Jinguo Liu Jinsong +1 位作者 Wang Wei Niu Zheng 《Chinese Journal of Population,Resources and Environment》 北大核心 2006年第3期28-36,共9页
Land degradation is one of the serious environmental problems that can lead to poverty, and is especially prominent in eco-fragile areas in developing countries and increases the risk of environmental safety. North He... Land degradation is one of the serious environmental problems that can lead to poverty, and is especially prominent in eco-fragile areas in developing countries and increases the risk of environmental safety. North Hebei Province belongs to an ecologically fragile region in North China, which has great impact on the eco-safety of Beijing and Tianjin. Using Landsat TM data and GIS, this paper evaluates land degradation in North Hebei province of China from the the 1960′s to 1987 and 2000. Land use/cover change pattern from 1987 to 2000, its regional difference and forest change characteristics will also be analyzed; soil erosion intensity and arable land suitability were also evaluated. Results revealed that land use/cover pattern in this study area did not change greatly from 1987 to 2000. The structure and function of regional land ecosystem was at a level of local improvement and integral deterioration. Land above medium soil erosion intensity reached 21 percent, which was also the area with a serious soil erosion and land degradation problem. Soil erosion and land degradation intensity of grassland was the biggest. For the present arable land, the proportion of high suitability was 13 percent. 展开更多
关键词 land degradation north hebei province soil erosion intensity arable land suitability evaluation
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Studies on Water Consumption Characteristics and Crops Rotation Effects in Plateau of Northern Hebei Province
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作者 ZHANG Li-feng, BIAN Xiu-ju and LIU Yu-hua(Hebei Agricultural University, Bonding 071001 ) 《Agricultural Sciences in China》 CAS CSCD 2002年第1期76-80,共5页
Experiments were carried out in 1994 - 1998 to study crop rotation and its effects on crop water consumption characteristics of field with sandy chestnut soil in the Plateau of north Hebei Province. Five crops includi... Experiments were carried out in 1994 - 1998 to study crop rotation and its effects on crop water consumption characteristics of field with sandy chestnut soil in the Plateau of north Hebei Province. Five crops including spring wheat, oat, pea, flax and potato were examined. There was little difference in field water consumption among the crops during the growing season. WUE varied significantly in a range of 1. 347 -11.177kg · ha-1 · mm-1 among crops and 11.44% - 46.66% among previous crops. It was pointed out that the land equivalent ratio (LER) can be used as an index to evaluate the biological effects of crop rotation comprehensively. The 2-4 year crop rotation patterns with higher LER were estimated in the paper. 展开更多
关键词 ROTATION Water consumption WUE LER Plateau of north hebei province
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Winter Wheat Drought Monitoring and Comprehensive Risk Assessment: Case Study of Xingtai Administrative District in North China 被引量:1
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作者 Yanrui Shang Qinghua Hu +1 位作者 Gongying Liu Hanwen Zhang 《Journal of Environmental Science and Engineering(A)》 2017年第3期135-143,共9页
Drought monitoring is the base for drought coping and adaptation. Xingtai is located in North China's key winter wheat production areas where drought is severe and frequent. The rainfall during winter wheat growing s... Drought monitoring is the base for drought coping and adaptation. Xingtai is located in North China's key winter wheat production areas where drought is severe and frequent. The rainfall during winter wheat growing season is just about 1/3 of total demand. Xingtai has typical mountainous, hilly and plain agricultural zones, compound rain-fed and irrigated farming patterns. The winter wheat irrigation has heavily depended on overdraw of groundwater in recent decades. In the study, the MODIS (Moderate-Resolution Imaging Spectroradiometer) images taken at the key winter wheat growing season (Mar. to May) in normal rainfall year (2006) were selected, extracted NDVI (Normalized Difference Vegetation Index) and LST (Land Surface Temperature) data, calculated TVDI (Temperature and Vegetation Drought Index), classified and mapped winter wheat drought intensity. Further, based on TVDI, a CDRA (Comprehensive Drought Risk Assessment) model for winter wheat drought disaster risk assessment was constructed and zoning was made. Verified by winter wheat yield, the risk zoning by CDRA is consistent with actual crop failure space. This method can be used in drought risk management. 展开更多
关键词 Key growing season of winter wheat TVDI (Temperature and Vegetation Drought Index) CDRA (ComprehensiveDrought Risk Assessment) Xingtai of hebei province in north China
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BUMPER HARVEST
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《Beijing Review》 2018年第26期3-5,共3页
An aerial photo of hay baling in Xingtang County,north China’s Hebei Province,on June 14.By June 19,20.7 million hectares of wheat had been harvested throughout the country.Of the total,95.5 percent was reaped by com... An aerial photo of hay baling in Xingtang County,north China’s Hebei Province,on June 14.By June 19,20.7 million hectares of wheat had been harvested throughout the country.Of the total,95.5 percent was reaped by combine harvesters,according to the Ministry of Agriculture and Rural Affairs. 展开更多
关键词 An aerial photo north China's hebei province
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