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Study on the Suitable Water-Saving Irrigation Technology for mining areas in the Northwestern Arid Desert Regions in China

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Journal of Geoscience and Environment Protection 2020年第10期8卷 127-133页

作者： Yanping Liu Hao Rong Dan Shan Zhanqi Liang Institute of Water Resources for Pastoral Area of the Ministry of Water Resources of China Hohhot China

Water is the key factor to ensure plant survival in the process of ecological restoration in the coal base of China northwest deserts. On the premise of meeting the mine production and living water demands, we should take measures such as dirt wastewater treatment and water-saving irrigation to increase income and reduce expenditure and allocate limited water re-sources rationally, to provide mining area ecological restoration maximum usable water resources. The mining dump has large slope and thin soil layer and it is easy to produce surface runoff. So it is particularly important to study the irrigation technology needed to satisfy vegetation restoration, on the premise of guaranteeing not to produce surface runoff and the slope stability. In this paper, through field plot test, the suitable irrigation method for mine slope, slope surface soil moisture migration characteristics and slope stability analysis were studied. Results show that three slope ir-rigation technologies have their own advantages and disadvantages. On the whole, the effect of drip irrigation is the best, micro spray irrigation is the second, infiltrating irrigation is not ideal. The permeability of mine soil slope is very strong, the infiltration rate of the slope direction is the high-est, inverse slope infiltration rate is lowest. In the process of irrigation, with the increase of soil moisture content, slope safety factor is the decreased obviously, the whole slope surface soil moisture content is 14% for the slope stability safety threshold.

关键词： mining areas Vegetation Restoration Side Slope Water-Saving Irrigation Stability

Current Status, Challenges and Policy Recommendations Regarding the Sustainable Development of mining areas in China

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Journal of Resources and Ecology 2014年第1期5卷 42-52页

作者：李倩张文忠王岱中国科学院地理科学与资源研究所北京100101 中国科学院大学北京100049

As important suppliers of energy resources, mining areas have made huge contributions to China’s socio-economic development. However, some factors are inhibiting the further development of mining areas and, thereby pose a threat to social stability, as wel as resource and energy security in the country. In 2012, the National Development and Reform Commission formulated a project aiming to support the sustainable development of mining areas. This study collected and compiled the project’s first-hand survey data from 128 mining areas across China and comprehensively investigated the current development status of the country’s mining areas. The problems facing the development of China’s mining areas are analyzed, and four speciifc suggestions are provided, namely：promote industry transformation, remove institutional constraints, improve people’s livelihoods to maintain the stability of mining areas, and protect the environment to provide a clean, healthy living environment for mining area residents. This paper provides the ifrst comprehensive and systematic picture of China’s mining areas and highlights the importance of mining areas for the country’s economic and social development.

关键词： mining areas status evaluation limiting factors policy suggestions

Study on the Suitable Water-Saving Irrigation Technology for mining areas in the Northwestern Arid Desert Regions in China

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Study on the Suitable Water-Saving Irrigation Technology for...

Spatial and temporal distribution of Mo in the overlying water of a reservoir downstream from mining area

作者： Yanping Liu Hao Rong Dan Shan Zhanqi Liang Institute of Water Resources for Pastoral Area of the Ministry of Water Resources of China

Water is the key factor to ensure plant survival in the process of ecological restoration in the coal base of China northwest deserts. On the premise of meeting the mine production and living water demands, we should take measures such as dirt wastewater treatment and water-saving irrigation to increase income and reduce expenditure and allocate limited water resources rationally, to provide mining area ecological restoration maximum usable water resources. The mining dump has large slope and thin soil layer and it is easy to produce surface runoff. So it is particularly important to study the irrigation technology needed to satisfy vegetation restoration, on the premise of guaranteeing not to produce surface runoff and the slope stability. In this paper, through field plot test, the suitable irrigation method for mine slope, slope surface soil moisture migration characteristics and slope stability analysis were studied. Results show that three slope irrigation technologies have their own advantages and disadvantages. On the whole, the effect of drip irrigation is the best, micro spray irrigation is the second, infiltrating irrigation is not ideal. The permeability of mine soil slope is very strong, the infiltration rate of the slope direction is the highest, inverse slope infiltration rate is lowest. In the process of irrigation, with the increase of soil moisture content, slope safety factor is the decreased obviously, the whole slope surface soil moisture content is 14% for the slope stability safety threshold.

关键词： mining areas Vegetation Restoration Side Slope Water-Saving Irrigation Stability

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Journal of Environmental Sciences 2021年第4期33卷 256-262页

作者： Zhixin Song Gangfu Song Wenzhong Tang Yu Zhao Dandan Yan Weilong Zhang School of Environmental and Municipal Engineering North China University of Water Resources and Electric PowerZhengzhou 450011China State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing100049China

This study aimed to evaluate the spatial and temporal variations of molybdenum(Mo)in the downstream water body of a Mo mine during three hydrologic periods(wet,dry and medium seasons).The physical properties in Luhun Reservoir reflected seasonal variations in different hydrological *** redox potential(ORP)and dissolved oxygen(DO)increased in the dry *** concomitant decrease in temperature(T),conductivity(COND)and total dissolved solids(TDS)were lowest in the wet *** p H value did not change significantly during the three hydrologic *** distribution of Mo in the dry season was high in upstream and low in downstream areas,which was significantly different from that of the wet and medium *** total Mo concentration in wet(150.1μg/L)and medium season(148.2μg/L)was higher than that in the dry season,but the TDS(288.3 mg/L)and the percentage dissolved Mo(81.3%)in overlying water was lowest in the wet *** was no significant relationship between the dissolved Mo and the total Mo with *** the dry season,the mean total Mo concentration was 116.3μg/L,which was higher than the standard limit value(70μg/L)for drinking water(US EPA-United States Environmental Protection Agency recommended value 40μg/L).Non-point source pollution is the main characteristic of mining area pollution,which was closely related to ***,the Luhun Reservoir contains substantial Mo pollution,which was a significant concern given that it is used as a source of drinking and irrigation water.

关键词： Seasonal variations Spatial Temporal Molybdenum mining areas

Effects of mixed-based biochar on water infiltration and evaporation in aeolian sand soil

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Journal of Arid Land 2022年第4期14卷 374-389页

作者： ZOU Yiping ZHANG Shuyue SHI Ziyue ZHOU Huixin ZHENG Haowei HU Jiahui MEI Jing BAI Lu JIA Jianli School of Chemical&Environmental Engineering China University of Mining and Technology(Beijing)Beijing 100083China State Key Laboratory of Water Resource Protection and Utilization in Coal mining Beijing 102211China National Institute of Clean-and-Low-Carbon Energy Beijing 102211China

Aeolian sandy soil in mining areas exhibits intense evaporation and poor water retention *** study was designed to find a suitable biochar application method to improve soil water infiltration and minimize soil water evaporation for aeolian sand *** the indoor soil column method,we studied the effects of three application patterns(A(0-20 cm was a mixed sample of mixed-based biochar and soil),B(0-10 cm was a mixed sample of mixed-based biochar and soil and 10-20 cm was soil),and C(0-10 cm was soil and 10-20 cm was a mixed sample of mixed-based biochar and soil)),four application amounts(0%(control,CK),1%,2%,and 4%of mixed-based biochar in dry soil),and two particle sizes(0.05-0.25 mm(S1)and0.980),but the R2 values of the Horton model exceeded 0.990 for all treatments(except for the treatment B2%(S2)).Compared with CK,all other treatments reduced cumulative soil

关键词： biochar water infiltration water evaporation aeolian sand soil mining areas

Heavy Metal Risk Assessment of Soils and Crops in the Intensive mining Area of Gejiu, Yunnan Province

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Journal of Geoscience and Environment Protection 2022年第11期10卷 128-139页

作者： Sijing Sun Chunyu Dong Hao Zhang Haichan Yang Naiming Zhang Li Bao Yunnan Agricultural University Kunming China Yunnan Laboratory of Improvement of Soil Fertility and Pollution Remediation Kunming China

In order to investigate the heavy metal contamination of soil-crop in mining-intensive areas of Gejiu stannary in Yunnan Province and its risk to human health, the single-factor contamination index method and the Nemero comprehensive contamination index method were used to evaluate the contamination risk of heavy metals (Cd and As) in the soil of mining-intensive areas, and the health risk evaluation model was used to study the risk brought by residents through the consumption of maize, wheat and broad beans. The results showed that the mean values of total As and Cd in the soil of the study area were 146 and 2.32 mg·kg-1, which were 8 and 10.5 times higher than the background values of soil environment in Yunnan Province and belonged to heavy pollution;the enrichment coefficients of As and Cd in maize were 0.1% and 5.7%, in wheat were 0.3% and 11.5%, in fava beans were 0.1% and 4.9%;the soil contamination indices in the four study areas of A, B, C, and D were 7.275, 6.797, 5.618, and 5.060, respectively. The results indicated that the soils in the study areas belonged to heavy contamination levels, and the enrichment ability of Cd in all three crops was stronger than that of As, with wheat being the strongest, As in the three crops and Cd in broad beans might be harmful to children. As in wheat and broad beans may be harmful to adults.

关键词： Heavy Metal Pollution Cadmium Arsenic Risk Assessment mining areas

Rapideye Images in the Study of Contaminated areas： The Case of Niccioleta （Tuscansy-ltaly）

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Journal of Earth Science and Engineering 2015年第7期5卷 403-409页

作者： Teresa Balvis Francesco Muntoni Roberto Rizzo GeoparcoS.c.a.r.l Via delle miniere snc Z.L 09030 Elmas Italy Consorzio del Parco Geominerario Storico Ambientale della Sardegna Via Monteverdi 16 09016 Iglesias Italy

mining activity in Italy has been one of the main productive activities for millennia, particularly in the Tuscany region which has a great mining tradition, unfortunately characterized in the past by a management little interest to environmental problems. The area under study is the disused mine Niccioleta, in Val d＇Aspra, located about 6 km NE of Massa Marittima in the province of Grosseto. The area is characterized by the presence of four major landfills, in which prevail quantitatively fine-grained materials resulting from the treatment by flotation of pyrite. The study of satellite images offers a new approach to the study of environmental problems. The results obtained from the RapidEye images showed the presence of pyrite and chalcopyrite followed from arsenopyrite, as confirmed by the analysis of diffractometer of the samples and by bibliographic data. RapidEye images lend themselves very to be used to monitor areas of disused mining deposits of ores with primary mineralization predominantly sulphides and subject to oxidized characterized by processes of oxidation/dissolution of pyrite sulphide most common and abundant. In fact, the results of this study have highlighted the potential of remote sensing applied to the study of mining areas, noting the possible benefits, both time and cost, which could be obtained by using these techniques.

关键词： Remote sensing RapidEye mining areas heavy metals.