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Subsidence control and farmland conservation by solid backfilling mining technology

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中国有色金属学会会刊：英文版 2011年第S3期21卷 665-669页

作者： GUO Guang-li1, 2, FENG Wen-kai3, ZHA Jian-feng1, 2, 3, LIU Yuan-xu1, 2, WANG Qiang1, 2 1. Key Laboratory for Land Environment and Disaster Monitoring of the State Bureau of Surveying and Mapping, China University of Mining and Technology, Xuzhou 221116, China 2. Jiangsu Key Laboratory of Resources and Environmental Information Engineering, China University of Mining and Technology, Xuzhou 221116, China 3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China Key Laboratory for Land Environment and Disaster Monitoring of the State Bureau of Surveying and Mapping China University of Mining and Technology Xuzhou 221116 China Jiangsu Key Laboratory of Resources and Environmental Information Engineering China University of Mining and Technology Xuzhou 221116 China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China

Solid backfilling mining technology, which decreases the height of fissure zone and caving zone, and alleviates the subsidence, is a new technology for farmland conservation. Based on the situation analysis of farmland destruction in mining area, three ways for farmland protection were proposed. In order to improve the feasibility of this technology, the limited filling materials should be used to increase resources recovery ratio, and then the surplus materials could be backfilled into goaf. An index, namely farmland conservation ability, was put forward to optimize the ways for farmland conservation. At last, the Wanbei coal mine was taken as a case for farmland conservation. It was shown that 3240 t dull coal was substituted and 52 hm2 farmland was conserved by solid backfilling mining in this coal mine.

关键词： solid backfilling farmland conservation mining subsidence equivalent mining height

Spatio-temporal patterns and driving mechanism of farmland fragmentation in the Huang-Huai-Hai Plain

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Journal of Geographical Sciences 2022年第6期32卷 1020-1038页

作者： ZHENG Yuhan LONG Hualou CHEN Kunqiu Key Laboratory of Regional Sustainable Development Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China School of Public Administration Guangxi UniversityNanning 530004China School of Public Administration Hunan UniversityChangsha 410082China

Exploring the spatio-temporal variations of farmland landscape patterns in a traditional agricultural region can provide scientific support for decision-making on sustainable rural land use and rural vitalization development. This study established a comprehensive evaluation index for farmland fragmentation with multiple aspects(dominance, integrity, aggregation, regularity, and connectivity) at the county scale. The goal was to identify the evolution of farmland fragmentation in the traditional agricultural region of the Huang-Huai-Hai Plain during 2000–2015 and investigate underlying drivers using panel data of 359 *** showed an accelerating but fluctuating fragmentation pattern of the farmland landscape. The indexes of dominance, integrity, and aggregation of farmland decreased most sharply, while the index of connectivity increased. Furthermore, the evolution of the farmland fragmentation pattern showed significant spatio-temporal heterogeneity, which is similar to the trajectory of urbanization and land use transition. farmland fragmentation in municipal districts also emerged earlier and was more severe than in county-level cities and *** influenced by advancing urbanization include the proportion of artificial land, population density, and proportion of primary industry;these factors drove the evolution of farmland fragmentation. In contrast, the increase in income of rural residents and production efficiency of farmland were the key factors contributing to the improvement in farmland connectivity.

关键词： landscape fragmentation divergent pattern driving mechanism farmland Huang-Huai-Hai Plain

Assessment of High-standard farmland Construction Effectiveness in Liaoning Province During 2011–2015

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Chinese Geographical Science 2019年第4期29卷 667-678页

作者： PU Luoman ZHANG Shuwen YANG Jiuchun YAN Fengqin CHANG Liping College of Earth Science Jilin University Changchun 130061 China Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130102 China Center for Spatial Analysis Department of Microbiology and Plant Biology University of Oklahoma Norman 73019 USA

At present, the large-scale construction of high-standard farmland in China has improved the quality of cropland and crop production and enhanced the eco-environmental security. To obtain a comprehensive understanding of high-standard farmland construction in Liaoning Province of China during the 12 th five-year period(2011–2015), through on-the-spot investigations and remote sensing monitoring, this study assessed the construction effectiveness of ten typical sampling projects in Liaoning Province and then presented practical suggestions. The main conclusions were as follows. 1) The ranges of increase in productivity of the ten sampling projects in Liaoning Province all surpassed the goal of 1500 kg/ha. 2) Among all sampling project areas, the levels of productivity stability of nine sampling projects were higher than that of the surrounding farmland in a severe drought year. However, the productivity stability of the high-standard farmland construction project in Faku County, Yiniupu Town, declined by 1.04% compared with the surrounding farmland. 3) Except for the high-standard farmland construction project in Dengta City, Dengta Irrigation Region, the productivity uniformity of the other nine sampling projects increased by 3.30%–88.10%. 4) Eight of the ten sampling projects belonged to Class 1, and two projects belonged to Class 2, showing that the effectiveness of high-standard farmland construction in Liaoning Province was quite *** were some suggestions for high-standard farmland construction in the future. All departments should strengthen cooperation and formulate corresponding protection and development strategies suitable for local conditions. Additionally, lasting management mechanisms should also be established. Using remote sensing monitoring to assess the high-standard farmland construction effectiveness during the 12 th five-year period could provide experience and decision-making support for high-standard farmland construction in the future.

关键词： high-standard farmland remote sensing monitoring productivity stability productivity uniformity Liaoning Province,China

Study on Environmental Risk and Economic Benefits of Rotation Systems in farmland of Erhai Lake Basin

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Journal of Integrative Agriculture 2012年第6期11卷 1038-1047页

作者： TANG Qiu-xiang REN Tian-zhi Wilko Schweers LIU Hong-bin LEI Bao-kun LIN Tao ZHANGGui-long Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China Institute of Agriculture Environmental Resources Research Yunnan Academy of Agricultural Sciences Kunming 650205 P.R.China Agro-Environmental Protection Institute Ministry of Agriculture Tianjin 300191 P.R.China Xinjiang Academy of Agricultural Sciences Urumqi 830043 P.R.China

This study was designed to find out an optimised planting system of reducing non-point （source） pollution by analyzing the reasons and the factors of influence non-point pollution in farmland of Erhai Lake basin. The results showed that incomes, residual nitrogen in soil, and the loss of nitrogen in surface water in rice-garlic system were higher than those in rice-fava bean system. There were positive correlations between the nitrogen loss of farmland, nitrogen inputs, residual nitrogen in soil, and incomes of farmland. Economic benefits and environment benefits are both appropriate, if the area of rice-garlic system would be reduced to 53% and the area of rice-fava bean system increased to 36% of total cropping area in the investigated watershed. Adjustment of planting structure and introduction of reasonable rotation systems is considered an effective measure of controlling agricultural non-point pollution in watersheds of Erhai Lake.

关键词： watershed management Erhai Lake farmland crop rotation environmental risk economic benefits

Influence of the variation in rural population on farmland preservation in the rapid urbanization area of China

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Journal of Geographical Sciences 2021年第9期31卷 1365-1380页

作者： ZHANG Mingyu CHEN Qiuxiao ZHANG Kewei Department of Regional and Urban Planning Zhejiang UniversityHangzhou 310058China School of Spatial Planning and Design Zhejiang University City CollegeHangzhou 310015China

In the past 40 years,cultivated land has faced the continued anthropogenic interference,which has become a significant issue for cultivated land preservation during rapid *** purpose of this research was to reveal the spatio-temporal evolutionary characteristics of cultivated land and the correlation between rural population variation and farmland change in *** county-level administrative units in Zhejiang Province were selected as the study area wherein spatio-temporal evolution comparative analysis for every 5 years from 2000 to 2015 was *** study used the pool method to estimate the impacts of the rural population variation,average slope,average elevation,rural residential disposable income,primary industry proportion,and road density on farmland utilization efficiency from the spatial perspective,which is represented by landscape metrics including the mean patch size,edge density,area weighted mean shape index,and area weighted mean patch fractal *** study showed that the cultivated land landscape index continued to rise after 2000 and then started decreasing after 2010,indicating a reduction in human interference after *** spatial variation of rural population of all county-level administrative units decreased from 2000 to 2010,and 62%of them began to increase after *** regression analysis results showed that the spatial variation of rural population was significantly and negatively correlated with the cultivated land landscape while the rural residential disposable income,average slope and primary industry proportion were all significantly and positively related to the cultivated land landscape *** results implied that the loss of the agricultural labor force and the difficulty of sloping farmlands adapting to mechanized farming were unconducive to farmland utilization efficiency improvement,and the increase in nonagricultural activities in rural areas would increase the difficulty of cultivated land p

关键词： rural population farmland landscape metrics Zhejiang Province

A New Rainwater Harvesting and Recycling System for Transforming Sloping Land into Terraced farmland

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Journal of Mountain Science 2014年第1期11卷 205-214页

作者： SHI Yuan-zhi WANG Yue-hong CUI Yuan-lai WANG Shi-wu ZHANG Yu-shuai State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Water Resources and Hydropower Bureau of Fuyang City Zhejiang Institute of Hydraulics and Estuary

Transforming sloping land into terraced land is an effective approach to cope with the problems including farmland shortage and severe soil *** paper introduces a new system based on rainwater harvesting and recycling technology,which may effectively improve farmland productivity rainwater use efficiency and reduce water and fertilizer *** new system consists of three subsystems：1） A plough layer with the dual function of crop cultivation and rainwater harvesting; 2） A tank below the plough layer for storing water; 3） An irrigation-drainage *** plough layer and the storage tank,both treated for reducing seepage,are connected through the irrigation and drainage *** showed that,compared with the traditional paddy fields,rice evapotranspiration（ and crop coefficient） in the test field remained at a similar level,while the irrigation amount was reduced by 44.3% under the condition of basin irrigation,and the drainage amount decreased by 86.6%,and the non-point source pollution was reduced to 67.7%~87.9%,and the rainwater utilization efficiency increased by 30% and reached 95.4%,and crop yield of middle-season rice reached 9,975 kg/hm2,which was only 0.4% lower than that in the traditional paddy field in the terms of dry *** new technology sheds light on new possibilities for transformation of hilly sloping land.

关键词： Hills Sloping land Terraced farmland Rainwater harvesting Recycling

Atmospheric Sulfur Deposition on farmland in East China

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Pedosphere 2005年第1期15卷 120-128页

作者： WANGTi-Jian YANGHao-Ming GAOLi-Jie ZHANGYan HUZheng-Yi XUCheng-Kai DepartmentofAtmosphericScience NanjingUniversityNanjing210093China DepartmentofAtmosphericScience NanjingUniversityNanjing210093China／／KeyLaboratoryofMeteorologicalDisasterandEnvironmentalVariationNanjingInstituteofMeteorologyNanjing210044China StateKeyLaboratoryofSoilandSustainableAgriculture InstituteofSoilScienceChineseAcademyofScienceNanjing210008China

Atmospheric sulfur deposition onto typical farmland in East China was investigated using both field measurements and numerical modeling. The field measurements were conducted at the Experiment Station of Red Soil Ecology, Chinese Academy of Sciences, 10 km from Yingtan, Jiangxi Province, East China, between November 1998 and October 1999, and at the Changshu Ecological Experiment Station, Chinese Academy of Sciences, in a rapidly developing region of Jiangsu Province, East China, between April 2001 and Marc…

关键词： atmospheric sulfur deposition East China farmland

Critical slope gradient for compulsory abandonment of farmland on the hilly Loess Plateau

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Chinese Science Bulletin 1998年第5期43卷 409-412页

作者： TANG Keli+1, ZHANG Keli 1,2 and LEI Aling 1,3 1. Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China 2. Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China 3. Water Resources C Institute of Soil and Water Conservation Chinese Academy of Sciences Yangling China Department of Hydraulic Engineering Tsinghua University Beijing China Water Resources Conservation Bureau of Yangtze River Ministry of Water Resources Wuhan China

Scientific evidence for the upper limit of farmland is proposed. Shallow gully erosion is one of erosion types distributed extensively on sloping farmland in the hilly regions of the Loess Plateau. Field observation and aerial photos interpretation, as well as laboratory experiments show that the shallow gully erosion occurring on the steeper farmland in the hilly regions of the Loess Plateau is an important factor leading to intensive erosion on slope, because of its extensive distribution and intensive runoff collection. The data on the formation, development and distribution of shallow gullies on sloping farmland indicate that critical slope gradient for shallow gully initiation ranges from 15 to 20 degrees with an average of 18.2 degrees. Therefore, it is suggested that critical slope gradient for compulsory abandonment of farmland on the hilly Loess Plateau should be kept within the critical slope gradient for shallow gully initiation to prevent shallow gully formation in order to control soil loss more effectively. But as the first step, the cultivation on the slopes with slope larger than 25 degrees where the maximum erosion occurs should be strictly forbidden.

关键词： hilly region of Loess Plateau upper limitation for farmland shallow gully erosion erosion dynamic.

ANALYSIS OF DRIVING FORCES ON THE CHANGE OF HISTORICAL farmland USE IN SHANDONG PROVINCE DURING THE QING DYNASTY (1644-1911)

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Chinese Geographical Science 2003年第3期13卷 207-215页

作者： ZHANG Xue-in, GE Quan-heng, ZHENG Jing-un(Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, P. R. China) Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing P. R. China

How land-cover has been changed by human use over the last 300 years is oneof the five overarching questions guiding the Land-use/Cover Change (LUCC) Science/Research *** has variety of historical documents providing unique data superiority. So the characteristicsof farmland area in Shandong Province during the Qing Dynasty (1644-1911) are summarized firstly: 1)the rising trend of farmland area was striking; 2) farmland area had remarkable fluctuation; 3)farmland area per capita decreased dramatically; 4) wasteland reclamation index increased ***, the driving forces of farmland area change are analyzed. It is concluded that natural andhuman factors are jointly influential. Among the driving forces, human dimensions are the mainfactors of farmland area change, which direct the general tendency of the changes mentioned *** the natural factors influence the stability of farmland area as well. Variation of the naturalfactors would act as the major contributory factor to farmland area change during years or periodsof abrupt climatic changes, or during the intensive occurring periods of natural hazards. Besides,the passive aspects of human factors, such as war chaos also influenced the fluctuation of thefarmland area. This research indicates that it is feasible to study the land-use/cover change byChinese historical literatures, which has huge potential to provide a comprehensive picture of thegrowing dominance of human land-use and land-cover patterns that can be used in many global changeresearch projects.

关键词： farmland driving forces shandong province qing dynasty