Key Laboratory of Land Consolidation

Beijing, China

Key Laboratory of Land Consolidation

Beijing, China

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Cao Y.,University of Science and Technology of China | Cao Y.,Key Laboratory of Land Consolidation | Bai Z.,University of Science and Technology of China | Bai Z.,Key Laboratory of Land Consolidation | And 3 more authors.
Environmental Earth Sciences | Year: 2016

The development of coal-resource-based cities is cyclical and presents different traits affected by different socio-economic driving forces in each stage. In this paper, we study urban land expansion in the Pinglu District in Shuozhou City, Shanxi Province, China, by interpreting six-phase remote sensing images to reveal the traits and driving forces of urban land expansion during different stages. Overall, the following results were observed. (1) Urban land expansion was obvious from 1986 to 2013, with an increase of 992.80 ha, mainly due to the occupation of cultivated land. Urban land expansion mainly occurred along the periphery of the city, which was 1–2 km from the urban centre. (2) The influence of the coal industry on urban land expansion can be divided into two stages, the establishment stage of the coal industry system and the development stage of coal industry promotion and urbanization. (3) The traits of urban land expansion matched economic models and traits. The non-agricultural population and industrial electricity consumption can reflect how economic development can impact urban land expansion. The periodic traits of urban land expansion and the coal industry life cycle have shown a high degree of consistency. Furthermore, the results of this study could serve as a reference for resource-based cities regarding urban land use and sustainable development. © 2016, Springer-Verlag Berlin Heidelberg.


Cao Y.,University of Science and Technology of China | Cao Y.,Key Laboratory of Land Consolidation | Wang J.,University of Science and Technology of China | Wang J.,Key Laboratory of Land Consolidation | And 8 more authors.
Environmental Earth Sciences | Year: 2015

Soil reconstruction on the open-cast mine dump is an important part of land reclamation. This study took soils at the south dump in Antaibao open-cast mine of China Coal Pingshuo Group as the research object and focused on analyzing the physical properties and differentiation mechanisms of the reconstructed soils collected from the dump along the slope and platform of shady slope, half shady slope, sunny slope, and half sunny slope of the open-cast coal mine at the overall level, site level, and terrain level, respectively, during the soil-rock mixture discharge process. The results are following: (1) the variation coefficients of soil bulk density, soil porosity, soil mass water content, as well as soil gravel content are at a state of medium variability. (2) After a long time of vegetation restoration, soil bulk density is decreased, soil porosity is increased, and soil mass water content quality is improved. (3) The physical properties of reconstructed soils at platform are slightly, but not significantly better than those at slope. (4) Most physical properties of the reconstructed soils are significantly different at the slope and aspect levels, but not at the altitude level. (5) At the slope level, the physical properties of reconstructed soils are significantly different between the moderately steep slope and high steep slope. (6) At the aspect level, soil bulk density, soil porosity and soil gravel content sunny slope are obviously different from those at half sunny slope, and soil mass water content at shady slope is significantly different from that at half shaded slope. Lastly, we proposed some specific measures to optimize land reclamation technologies. © 2015, Springer-Verlag Berlin Heidelberg.


Hu Y.,China University of Geosciences | Hu Y.,Key Laboratory of Land Consolidation | Zheng Y.,China University of Geosciences | Zheng X.,China University of Geosciences | Zheng X.,Key Laboratory of Land Consolidation
Chinese Geographical Science | Year: 2013

This study investigated and simulated land use patterns in Beijing for the year 2000 and the year 2005 from the actual land use data for the year 1995 and the year 2000, respectively, by combining spatial land allocation simulation using the CLUE-S model, and numerical land demand prediction using the Markov model. The simulations for 2000 and 2005 were confirmed to be generally accurate using Kappa indices. Then the land-use scenarios for Beijing in 2015 were simulated assuming two modes of development: 1) urban development following existing trends; and 2) under a strict farmland control. The simulations suggested that under either mode, urbanized areas would expand at the expense of land for other uses. This expansion was predicted to dominate the land-use conversions between 2005 and 2015, and was expected to be accompanied by an extensive loss of farmland. The key susceptible to land-use changes were found to be located at the central urban Beijing and the surrounding regions including Yanqing County, Changping District and Fangshan District. Also, the simulations predicted a considerable expansion of urban/suburban areas in the mountainous regions of Beijing, suggesting a need for priority monitoring and protection. © 2013 Science Press, Northeast Institute of Geography and Agricultural Ecology, CAS and Springer-Verlag Berlin Heidelberg.


Cao Y.,University of Science and Technology of China | Cao Y.,Key Laboratory of Land Consolidation | Zhang X.,University of Science and Technology of China | Bai Z.,University of Science and Technology of China | And 6 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2015

The transformation of land use type occurs frequently in the composite area of ore-agriculture-urban driven by industrialization, urbanization and urban-rural integration. This transformation is especially affected by the government policy of returning marginal cultivated land to forest and grassland, and reclamation of urban and rural construction occupied land and opencast mining site. This study aimed at revealing the process, characteristics and major causes of land use type transformation in nearly 30 years in the composite area of ore-agriculture-urban in the Loess region. With transformation maps of land use types in the periods of 1986-1996, 1996-2000, 2000-2004, 2004-2009 and 2009-2013, the important values, areas and space distribution of main transformation types were analyzed. The zoning of land use type transformation during 1986-2013 was divided, and the causes of land use type transformation were discussed. The results showed that the differences of transformation types in different periods were obvious and the number of transformation types was increased. There were 17 transformation types in the period of 1986-2013 and the sum of important values of the dominate transformation types was 94.58%, and the other transformation types were 22 and the sum of important values were 5.42%. The sum of important values in different periods presented decreasing trend. The transformation types gradually presented from the state of transformation in farmland to the coexistence of transformation in farmland, transformation between farmland and construction land, transformation between farmland and damage land. The results also showed that all transformation types presented the trends of convergence and diversity in regional distribution. In Xiangyangbao county, Jingping town, Baitang county, transformation from cultivated land into construction land was significant. In the southeast of Jingping town, the northwest of Taocun county, and the middle part of Yuling county, a great amount of cultivated lands became damage lands. Transformation among cultivated land, forestland and grassland was noticeable in the east, the southeast and the north of the studied area. The study area has been divided into regions of farmland transformation to construction land, farmland transformation to damage land, and region of farmland transformation to farmland transformation. Meanwhile, the region of farmland transformation was divided into region of cultivated land transformation to forest land, region of cultivated land transformation to grassland. The areas were nearly balanced on cultivated land transformation to forest land and cultivated land transformation to grassland in the period of 2009-2013. In addition, the results showed farmland decrease was mainly due to the reduction of cultivated land. The cultivated land was the dominant land use type in the transformation by converting into forestland, grassland, rural residential and stripped land, impacted by returning cultivated land to forest land and grassland, occupied construction land and opencast mining damage. The area was 1.01×104 hm2 on cultivated land transformation to forest land and grassland in the period of 1986-2013. The increase of construction land was promoted by urban expansion and land demand for farmers building new houses for improving the living condition and illegal building houses for more land requisition compensation. The area was 0.24 ×104 hm2 on cultivated land transformation to construction land in the period of 1986-2013. Damage land growth was related to the scale enlargement of coal production. The area was 0.37× 104 hm2 on cultivated land transformation to damage land in the period of 1986-2013. The findings can provide references for land sustainable use and protection of ecological environment to the research area. ©, 2015, Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering. All right reserved.


Zhang X.R.,University of Science and Technology of China | Bai Z.K.,University of Science and Technology of China | Bai Z.K.,Key Laboratory of Land Consolidation | Cao Y.G.,University of Science and Technology of China | And 5 more authors.
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2016

Open-pit mining area is an area greatly disturbed by human activities. Landscape change in this area, caused by large-scale exploitation of mineral resources, leads to differences in ecosystem evolution between mining area and the natural environment. The ecosystem in a mining area plays a significant role in the human society. Its healthy development contributes significantly to the sustainable economic development of the whole society. In order to better understand the ecosystem in a mining area and provide scientific basis for its management, it is necessary to analyze and evaluate evolution process. This paper analyzes the process of ecosystem evolution and calculates the ecological storage in the Pingshuo outsized open-it coalmine in Shanxi Province, China. The ecological storage model, which is based on the theory of ecosystem service value, comprises state evaluation, process evaluation and capability evaluation, and describes the ecological condition of study area with respect to the static state, changes and conversion direction. The land use information studied herein was extracted from remote sensing images made in 1986, 2000 and 2013. The results indicate the following: 1) The area of arable land and forestland decreases sharply, while urban and rural construction land and destruction land increase dramatically. 2) The evolutionnary process of ecosystem in the Pingshuo mining area can be divided into three stages: the origin stage, the destruction stage, and the reconstruction stage. The characteristics of land use in each stage are different as the diversity of landscape increases 3) The ecosystem types of the Pingshuo mining area include farmland, forest, grassland, urban, and industrial ecosystem. The conversions among these ecosystem types in the periods 1986-2000 and 2000-2013, caused by urban expansion, severe mining activities and land reclamation were very active; 4) The ecological storage state shows a trend of deterioration, the ecological storage process presents a reverse process, and the ecological storage capacity influenced by land reclamation and eco-engineering tends to be higher. In addition, of the image of the ecosystem evolution cycle has been mapped according to the development of mining industry. The image indicates that: the evolution of an ecosystem in open-pit mining area reflects the change in land use; the results of the ecological storage model are in relative accordance with the current conditions at the mining site; and timely and effective land reclamation and other eco-engineering practices can improve the ecological condition of a mining area. This paper presents the first systematic analysis of the evolutionary process of the ecosystem in the Pingshuo mining area relative to the change in land use, and employs for the first time the ecological storage model on the open-pit mine to evaluate the ecological condition of an outsized open-pit coalmine. The findings of this paper provide references for land reclamation and ecological restoration of outsize open-pit mining areas in China. © 2016, Ecological Society of China. All rights reserved.


Cao Y.,University of Science and Technology of China | Cao Y.,Key Laboratory of Land Consolidation | Bai Z.,University of Science and Technology of China | Bai Z.,Key Laboratory of Land Consolidation | And 10 more authors.
Journal of Food, Agriculture and Environment | Year: 2014

In this study, we collected soils from 11 plots of the reclaimed cropland at a large-scale opencast coal mining area, analysed their profile properties and compared these properties with the properties of undamaged and unreclaimed croplands. These properties were compared using comparative analysis, variance analysis, correlation analysis and principal component analysis to reveal the underlying rules of variation with reclamation years. The results indicate that the soil profile properties of the reclaimed cropland vary significantly with differences in depth, particularly at depths of 30, 40 and 50 cm. In addition to soil organic matter and soil total K, most significant differences among the three types of croplands were soil fertility followed by soil physical indicators. There were positive correlations between soil bulk density and soil pH (p<0.01), between soil field moisture capacity and total phosphorus (p<0.05), between soil organic matter and total nitrogen (p<0.01), between soil organic matter and soil available K (p<0.01) and between soil organic matter and soil total phosphorus (p<0.01). The primary physicochemical factors affecting the properties of soil in reclamation croplands were soil physical and chemical indexes for those croplands that have been reclaimed for 2 years and organic matter and soil nutrients for those croplands that have been reclaimed for 13 years and 18 years, as well as undamaged cropland. The distribution of the physical soil profile and chemical properties of the croplands that have been reclaimed for 13 and 18 years were highly consistent with the properties of the undamaged croplands.

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