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2019 Vol. 6, No. 5
Published: 2019-10-20
 
1 Progresses and main achievements of geological environment comprehensive survey project in the Yangtze River Economic Zone
JIANG Yuehua, ZHOU Quanping, CHEN Lide, NI Huayong, LEI Mingtang, CHENG Heqin, SHI Bin, MA Teng, GE Weiya, SU Jingwen, LI Yun, TAN Jianmin
DOI: 10.19388/j.zgdzdc.2019.05.01
In order to protect the ecological environment of Yangtze River, China Geological Survey has organized and implemented the project of “Geological environment comprehensive survey project in the Yangtze River Economic Zone” in recent years. A number of important achievements and understandings have been achieved by means of environmental geological survey, evaluation, monitoring, thematic research and comprehensive research. ①The comprehensive information management and service platform of geological resources and environment of the Yangtze River Economic Zone was preliminarily constructed, and resource and environmental conditions and major geological problems of the Yangtze River Economic Zone and key regions were systematically combed with relevant suggestions. ②The optical fiber technology was innovatively applied to ground subsidence and ground fissure monitoring, and the related achievements have led the development of optical fiber monitoring technology. ③1:50 000 environmental geological survey technical standards and requirements were prepared. ④Three-level mechanism of environmental geological survey cooperation was formed, and establishment of three kinds of scale resources and environment carrying capacity evaluation method system and large basin environmental geological work model were explored. ⑤The monitoring network of Earth Critical Zone was established and the guidelines for Earth Critical Zone in the plain were compiled. ⑥The multi-response ideas of major water conservancy projects and ecological geological environment were proposed, with the construction of multi-mode sensor survey system. And the new judgment of the impact of major water conservancy projects on the geological environment was put forward. ⑦Quaternary stratigraphic multiple division and comparison sequence of different sedimentary unit areas in the middle and lower reaches of Yangtze River were established, and three-dimensional geological structure model in key areas was constructed, so the new understanding of Yangtze River transfixion period and evolution was put forward. ⑧A series of geological survey reports and maps for river basins, economic zones and cities were prepared to support and serve result transformation. The advances mentioned above have raised the level of geological survey work in the Yangtze River Economic Zone, and will provide scientific and technological support for regional land space planning, building green ecological corridors, building three-dimensional transportation corridors, industrial transformation and upgrading, building new urbanization, and tackling poverty alleviation.
2019 Vol. 6 (5): 1-20 [Abstract] ( 384 ) RICH HTML PDF (26435 KB)  ( 360 )
21 Division and comparison of Pleistocene in Jianghan-Dongting area and Huangguang-Jiujiang area
CHEN Lide
DOI: 10.19388/j.zgdzdc.2019.05.02
In order to further clarify the division and comparison of Pleistocene of Jianghan-Dongting and Huangguang-Jiujiang areas in the middle reaches of Yangtze River, based on the regional geological survey, the unconformity relationship between the Early Pleistocene gravel layer and the overlying latticed laterite was identified in this paper. And the Quaternary System of this area has been studied, with supplementary of chronology study. Besides, reginal sequence division and comparative framework were established. The results show that gravel layers, such as Baishajing, Yangluo, Yichang and Jiujiang, were the pluvial facies sediments of Yangtze River, and epoch was late Early Pleistocene (Qp1). The overlying reticulate red clay was formed in Middle Pleistocene (Qp2), and the contact relationship between these two layers was unconformity. The stratigraphic framework of Pleistocene Series in this area was established based on the research results above. The major adjustment of hydrodynamic conditions and sedimentary environment represented by gravel layers, such as Baishajing, Yangluo, Yichang and Jiujiang, and the overlying reticulate red clay were the environmental response of the continuous connection of Three Gorges of Yangtze River. It also suggested that the continuous connection of Three Gorges of Yangtze River occurred in the Early to Middle Pleistocene.
2019 Vol. 6 (5): 21-27 [Abstract] ( 330 ) RICH HTML PDF (6319 KB)  ( 399 )
28 Division of Quaternary geological units based on stratigraphic architecture combination: A case study in Wanjiang River Economic Zone
SU Jingwen, GONG Jiangshi, LI Yunhuai, LI Yunfeng, WANG Yi, DONG Changchun, YANG Yang, YE Yonghong, WEI Feng, ZHU Chunfang, WANG Rui, CAI Lei
DOI: 10.19388/j.zgdzdc.2019.05.03
In order to support the geological investigation and research of hydrological engineering environment in the areas with complicated geological conditions, the authors analyzed systematically the lithology, architecture and structure of Quaternary strata in hilly plain areas of Wanjiang River Economic Zone. Taking the geomorphology, Quaternary genesis, sedimentary facies and sediment provenance as the indexes, combined with the existing regional Quaternary research achievements and the classification of chronostratigraphy and lithostratigraphy, the authors carried out the division of Quaternary geological units in hilly plain areas along Wanjiang River. The hilly plain areas were divided into three first-level geological units, namely, alluvial-lacustrine plain geological units, flood-slope hilly geological units and residual-denuded hilly geological units. Seven types of Quaternary stratigraphic structure combinations and their characteristics are summarized. This study can lay a foundation for regional hydrogeological and engineering geological survey and research.
2019 Vol. 6 (5): 28-35 [Abstract] ( 412 ) RICH HTML PDF (9216 KB)  ( 332 )
36 Hydrogeochemical characteristics of the shallow pore water in Western Jianghan Plain
HE Jun, XIAO Pan, PENG Ke, XU Ke
DOI: 10.19388/j.zgdzdc.2019.05.04
Western Jianghan Plain was taken as an example to reveal the migration of groundwater from periphery to the center of Jianghan Plain and complex hydrogeochemical action. Hydrogeochemical characteristics of the shallow pore water in the margin of Western Jianghan Plain were studied by the methods of mathematical statistics, water chemistry, isotope geochemistry and relationships between ions and so on. The results showed that HCO3-Ca·Mg is the dominant chemical types in flat country. HCO3-Ca·Mg is the dominant chemical types in hilly and mound land, with small amount HCO3·SO4-Ca·Mg. Besides, the HCO3·NO3-Ca·Mg is also existent in hilly and mound land and the increasing total dissolved solids is due to the dissolution of carbonate rocks. Shallow pore water is mainly from atmospheric precipitation, and barely influenced by evaporation. The dissolution of calcite, dolomite and gypsum is the dominant hydrogeochemical process, and they are the main source of Ca2+ and Mg2+. The main source of Na+ and K+ is by cation exchange adsorption.
2019 Vol. 6 (5): 36-42 [Abstract] ( 320 ) RICH HTML PDF (3546 KB)  ( 351 )
43 Hydrochemical characteristics of groundwater in Laoguanhe River Basin of Danjiangkou Reservoir
DAI Zhenwei, WANG Lei, FU Yongpeng, ZHANG Yu, ZHANG Fangliang, DONG Xincen, HE Xiaohei
DOI: 10.19388/j.zgdzdc.2019.05.05
As water source of the Middle Route of South-to-North Water Transfer Project, the water quality of groundwater in Danjiangkou Reservoir is the key factor influencing the construction of South-to-North Water Transfer Project. In order to ensure the water transfer from Danjiangkou Reservoir to Beijing, the authors investigated the hydrochemical characters of groundwater, based on the sampling, statistics and related analysis of groundwater in Laoguanhe River Basin. The results show that the groundwater in Laoguanhe River Basin of Danjiangkou belongs to alkalescence and low mineral, and the dominant cation is Ca2+, while the dominant anion is $HCO_3^-$. Except for the $NO_3^-$, the main ions contents can reach the drinking water standard of China and the World Health Organization. The main hydrochemical types are Ca-Mg-HCO3 and Ca-HCO3 in both high-water and low-water periods, and the hydrochemistry process is mainly efflorescence-lixiviation. The $NO_3^-$ content of groundwater exceeds 13% to 17%, and the Cl- type groundwater may occur during high-water period. Season change barely influenced the spatial distribution of groundwater hydrochemical type in Laoguanhe River Basin, and the groundwater quality is mainly influenced by the human activities, such as agriculture, aquaculture, industrial residual waste and domestic sewage.
2019 Vol. 6 (5): 43-49 [Abstract] ( 387 ) RICH HTML PDF (3762 KB)  ( 486 )
50 Preliminary study on soil quality assessment and producing area suitability in Yangtze River Economic Zone
LIU Hongying, JIANG Yuehua, YANG Hui, XU Naizheng, YANG Guoqiang, JIN Yang
DOI: 10.19388/j.zgdzdc.2019.05.06
It is of great significance to carry out soil quality assessment for the delimiting of the permanent basic farmland and overall optimization of agricultural production layout. Nemerow comprehensive pollution index, grading, cumulative frequency and integrated decision method were adopted in this paper, and Risk Control Standard for Soil Contamination of Agricultural Land (GB 15618-2018 ) and Green Food- Environmental Quality for Production Area (NY/T391-2013) were chosen as reference. The heavy metals, pH values, beneficial elements abundance-deficiency and producing area suitability for green agricultural products were evaluated in Yangtze River Economic Zone. The land quality of the study area is generally good, and the clean land area is 348 400 km2. The heavy metals content of the soil inherits the characteristics of natural background. The land area of and below the third stage is 69 400 km2, distributed in star-shaped plaques in Northeast and South Jiangxi, Changsha-Chenzhou area of Hunan, along the river and Guiyang, Kunming and other places. Their heavy metals enrichment was caused by natural factors or mining development, combustion of coal and oil and industrial three wastes emission. Acidic soil area is 335 600 km2, mainly distributed in Jiangxi, Hunan, Ningbo-Taizhou coastal region and Jinhua-Quzhou Basin. Alkaline soil area is 156 900 km2, mainly distributed in North Jiangsu Plain, around Dongting Lake area, Chengdu Plain and the area along the Yangtze River. Soil acidity and alkalinity is related to soil type. Abundance-deficiency of beneficial elements in soils is related to the soil parent material of Quaternary sediments, and the moderate-high area of beneficial elements is 344 400 km2, mainly distributed in Sichuan Aba, Chengdu Basin, around Dongting Lake, around Poyang Lake, Anhui Province along Yangtze River, North Jiangsu coastal region and Hangzhou-Jiaxin-Huzhou Plain. Deficiency area of beneficial elements is 138 900 km2, distributed in South Jiangxi, Jianghuai, Northeast Hubei and Yunnan Yuxi and other places. The most suitable area, suitable area and unsuitable area for green agricultural products are about 224 900 km2, 187 800 km2 and 182 800 km2 respectively. According to the producing area suitability for green agricultural products, cultivated land quality and site condition in the region, 7 pieces of permanent farmland protection proposal areas are established.
2019 Vol. 6 (5): 50-63 [Abstract] ( 405 ) RICH HTML PDF (11423 KB)  ( 475 )
64 Progresses on environmental geological survey of shale gas exploration development zone in Fuling of Chongqing
ZHU Jiliang, FU Jie, WANG Sai, SUN Jianping, MA Xin, XU Mo, SUN Dong, CHEN Si
DOI: 10.19388/j.zgdzdc.2019.05.07
In combination with the key strategy of national unconventional energy exploration and development, this paper focuses on the environmental geological survey of shale gas exploration and development zone in Fuling of Chongqing. The authors summarized the karst developing characteristics and distribution in the study area, and evaluated the regional water resources and groundwater quality. On this basis, they collected and analyzed the domestic and foreign data, and summarized six types of environmental(geological) problems triggered by shale gas exploration and development. And they pointed out that the geological environmental problems and risks need to be paid attention in five stages, such as exploration, drilling, fracturing, mining and silencing. There are water-soil pollution, geological hazards and air pollution in Fuling shale gas exploration and development zone. Two models of groundwater pollution, three types of pollution, and potential risk pathways of groundwater pollution were basically identified. The indicative factors of pollution in Fuling shale gas exploration development zone have been preliminarily ascertained, and the index system of geological environmental effect evaluation in this zone has been established, which can provide some guidance for the environmental geological survey of shale gas exploration and development. This research can provide support to the green development and ecological civilization construction of shale gas national new clean energy.
2019 Vol. 6 (5): 64-73 [Abstract] ( 386 ) RICH HTML PDF (9268 KB)  ( 158 )
74 Geological resources endowment and green industry development of Chengdu-Chongqing Urban Agglomeration
SONG Zhi, NI Huayong, JIANG Yuehua, WANG Donghui, LI Minghui, CHEN Xuyu, TIAN Kai, LI Dan
DOI: 10.19388/j.zgdzdc.2019.05.08
Previous geological survey achievements of Chengdu-Chongqing Urban Agglomeration were carded systematically and the support points of Geological resources on the green urban development were analyzed in this paper. The results show that the proven geological reserves of natural gas in the Chengdu-Chongqing Urban Agglomeration area account for 60% of the national reserves and the proven total reserves of shale gas approach nearly 1 trillion cubic meters, with large-scale development of gas field being realized in Jiaoshiba of Fuling district. The geothermal resources are abundant and the potential for the development of buried pipe heat resources are huge. The mirabilites and other competitive non-metallic mineral resources show great reserves and good conditions for development, which is good for further industrialized development. There are 39 middle and large-sized rock salt mines, with undevelopment underground space, which means huge potential for the development of salt cavern resources can be expected. 153 sources of natural drinking mineral water are distributed in this area and most of them contain Sr and other beneficial elements, thus the development of top-grade drinking mineral water is recommended. Geological relics in this area have bright features, with 164 important geological relics being identified, so the construction of regional brands featwing in dinosaur fossil groups is recommended. The farmland resources are abundant here, accounting for more than 50% of the total land area. The total nutrients are abundant in this area and some regional areas are rich in Se, with the development of some brands of agricultural products. Thus the construction of standard farmland is recommended in Dujiangyan-Mianyang area to develop Se-rich agricultural products. Further survey on the land quality in blank areas of the Chengdu-Chongqing Urban Agglomeration, and regional and key industries geological survey are recommended to constantly improve the effects of natural resources in supporting the green development of the Chengdu-Chongqing Urban Agglomeration.
2019 Vol. 6 (5): 74-82 [Abstract] ( 399 ) RICH HTML PDF (10442 KB)  ( 292 )
83 Research on water quality evaluation of the Houzi River in the pyrite mining area of the Hanjiang River Basin
DAI Zhenwei, WANG Lei, HE Xiaohei, FU Yongpeng, PAN Wei, ZHANG Yu
DOI: 10.19388/j.zgdzdc.2019.05.09
In order to find out the water pollution extent in different areas of Houzi River, water samples were collected from four typical river sections of the tributary, and water quality analysis was carried out. The single factor evaluation method and the comprehensive water quality index method were used for evaluation and analysis. The results show, (1) the results of water quality evaluation of Houzi River in the pyrite mine area based on the single factor evaluation method are all inferior V class water with no difference. Nevertheless, the comprehensive water quality index method is used to evaluate the water quality of Houzi River in the four sections HZ001, HZ002, HZ003 and HZ004, from near to far of the pyrite mining area, and the comprehensive water quality index is gradually decreasing. And the corresponding categories are inferior V with black odor, inferior V but without black odor, class IV, class III respectively. All these results are in line with the actual situation based on the site investigation, which can really reflect that the water quality is becoming better with the increasing distance from the source of pollution. (2) The comprehensive water quality index method can objectively reflect the comprehensive water quality category of each section in the same river, the different pollution levels in the same water quality category, and the comparison with the water environment functional area category. And this method can also achieve the fine division of the pollution degree of inferior V water quality, which is more objective, scientific and comprehensive than the single factor evaluation method. So, the comprehensive water quality index method is suitable for the study of water pollution of different river sections in heavily polluted areas such as mining areas.
2019 Vol. 6 (5): 83-88 [Abstract] ( 354 ) RICH HTML PDF (3677 KB)  ( 267 )
89 Characteristics of rock salt mines and suitability evaluation of salt cave storages in Yangtze River Economic Zone
LIU Hongying, JIANG Yuehua, YANG Guoqiang, JIN Yang, YANG Hui, ZHOU Quanping
DOI: 10.19388/j.zgdzdc.2019.05.10
Yangtze River Economic Zone, which includes 11 provinces (cities) of Shanghai, Jiangsu, Zhejiang, Anhui, Jiangxi, Hubei, Hunan, Sichuan, Chongqing, Yunnan and Guizhou, is an important economic development area in China, and the long-term safety and reliable storage of oil and gas resources is very important for the sustainable development of this region. According to the demand of construction planning and layout of strategic oil storage and gas storage base in Yangtze River Economic Zone, on the basis of fully collecting and utilizing the previous geological survey and research results, the authors comprehensively researched and analyzed the rock salt mines in the study area. Hierarchy structure model was built to evaluate the suitability of salt cave storages construction. Except Shanghai and Guizhou, the rock salt deposits were found in the 9 provinces (cities) of Yangtze River Economic Zone. The main salt-forming age was Sinian, Triassic, Cretaceous and Paleogene. The range of salt-forming basins is 0.29~10 000 km2, with accumulated salt layers thickness of 3~1 050 m, and the ore body burial depth is 40~3400 m. Nacl content of ores is 20%~99.86%, and the rocks of top-bottom plate and interlayer of orebody are mainly mudstone, powder sandy mudstone and muddy powder sandstone. Geological survey shows that most of the underground salt caves in the region are far away from earthquake belt and have stable tectonic background, which can be used as oil storage. According to the sealing and safety of gas storage, 6 salt mines such as Jintan Basin in Jiangsu are of moderate buried depth and better geological conditions, which are suitable for the construction of salt cave gas storage. Regional areas in 14 basins such as Huai’an Basin in Jiangsu can also be built for natural gas storage. 11 salt mines such as Dianjiang, Chongqing, are of larger buried depth, which are also suitable for salt cave storages of natural gas, while their construction costs may increase. Some layers of 21 salt mines such as Lixiang, Hunan, are of shallow buried depth, but their deeper salt layers space should be selected. It is suggested that the salt caverns can be exploited first in the salt mine of Jintan, Huai’an, Zhaoji and Fengxian in Jiangsu Province, Qingjiang and Huichang in Jiangxi Province, and Yunying, Tianmen Xiaoban and Qianjiang in Hubei Province.
2019 Vol. 6 (5): 89-98 [Abstract] ( 462 ) RICH HTML PDF (6907 KB)  ( 612 )
99 Suitability evaluation and geological suggestions of the bridge construction sites along the middle reaches of Yangtze River
ZHAO Xingyuezi, PENG Ke, XIAO Pan, HE Jun, CHENG Gang, DENG Birong
DOI: 10.19388/j.zgdzdc.2019.05.11
Based on the geological environmental conditions along the middle reaches of Yangtze River and the basic requirements of the bridge site construction, three evaluation factors—topography and landform, regional stability, and engineering geological conditions were chosen in this paper. The authors applied Analytic Hierarchy Process (AHP) to evaluate the construction suitability of the bridge site along the middle reaches of Yangtze River. Four grades as appropriate for development, relatively appropriate for development, generally appropriate for development, and non-priority development, were divided. The bridges in the middle reaches of Yangtze River are mainly areas suitable for development and generally suitable for development, with lengths of 625.19 km and 598.99 km respectively, which account for 31.35% and 30.04% of the total length of the bank line. According to the characteristics of each grade in the middle reaches of Yangtze River, corresponding geological suggestions were put forward. It is expected to provide geological guidance for optimizing the site selection of the bridge along the middle reaches of Yangtze River, and to promote the spatial planning of Yangtze River Economic Zone and the utilization and protection of the bank line.
2019 Vol. 6 (5): 99-106 [Abstract] ( 425 ) RICH HTML PDF (3395 KB)  ( 262 )
107 Suitability evaluation of port construction site in Three Gorges Reservoir based on hybrid units
LIU Yue, TAN Jianmin, LI Yuanyao, LI Ming, XIE Jialong, LIU Zhuang
DOI: 10.19388/j.zgdzdc.2019.05.12
Yangtze River is the largest inland shipping traffic artery in China. After the construction of the Three Gorges Reservoir, about 300 km of river water level in Three Gorges Reservoir rose sharply and the ports and wharves on both sides of the original channel were submerged. Therefore, it is of great practical significance to develop the suitable construction areas for the new ports and wharves under current coastline environment and dynamic water level regulation and storage conditions. Fourteen factors from five categories including topography and geomorphology, regional stability, engineering geological conditions, traffic location conditions and ecological sensitivity were chosen in this paper to evaluate port constructive site suitability on main coastlines from Yichang to Wanzhou section in Three Gorges Reservoir, based on the improved comprehensive index evaluation model. The evaluation results are as follows. (1) The suitable construction area accounts for 13.81% and the less suitable construction area accounts for 25.80%, while the less unsuitable construction area accounts for 31.38% and the unsuitable construction area accounts for 29.01%. (2) The suitable area of northern bank is mainly distributed in the Letianxi town and Taipingxi town of Yiling district, Shuangjiang town of Yunyang county and Wanzhou city district. And the suitable area of southern bank is mainly distributed in Maoping town of Zigui county, the southern bank of Fengjie county, and upstream and downstream in the southern bank of Wanzhou city district. The evaluation results have certain guiding significance for future site selection of port resources development along the main coastlines from Yichang to Wanzhou section.
2019 Vol. 6 (5): 107-114 [Abstract] ( 366 ) RICH HTML PDF (4354 KB)  ( 318 )
115 Progresses on monitoring network construction of Earth’s Critical Zone in Jianghan Plain
LI Junqi, MA Teng, DENG Yamin, DU Yao, WANG Zhiqiang, JIANG Yuehua
DOI: 10.19388/j.zgdzdc.2019.05.13
Earth’s Critical Zone is one of the hot research fields in Earth science. In China, the research of Earth’s Critical Zone is still in the initial stage, and how to form the investigation and research mode of Earth’s Critical Zone with Chinese characteristics still needs to be explored at present. Jianghan Plain, located in the middle reaches of Yangtze River, is an important part of Yangtze River Economic Zone, and it’s also under the influence of different scales hydraulic projects. On the basis of several years’ investigation, the authors have established a systematic monitoring network in Jianghan Plain, covering various elements of Earth’s Critical Zone, such as water, soil, gas and biology. In the design of monitoring network, they not only considered the influence of different scales hydraulic projects, but also the enrichment characteristics of regional nutrient elements and heavy metals. In the monitoring technology, they have achieved the in-situ monitoring of some indexes and the field testing of most indexes. The next work is to enhance online monitoring and achieve remote data transmission in the near future. At present, the monitoring network of Earth’s Critical Zone in Jianghan Plain has been successfully incorporated into the global Earth’s Critical Zone research network, which is a preliminary exploration for the investigation and research of Earth’s Critical Zone in China. This research can not only provide demonstration for the investigation and research of Earth’s Critical Zone in Yangtze River Basin, but also provide strong theory and method support for the great protection strategy of Yangtze River.
2019 Vol. 6 (5): 115-123 [Abstract] ( 367 ) RICH HTML PDF (5053 KB)  ( 285 )
124 Land utilization modes of debris flow disaster areas in the upper reaches of Fujiang River
YANG Shun, HUANG Hai, TIAN You, XIE Zhongsheng
DOI: 10.19388/j.zgdzdc.2019.05.14
The upper reaches of Fujiang River of Yangtze River Basin is characterized by high mountains and narrow canyons, which results in serious contradiction between local people and land. Due to the good moisture and energy condition, the debris flow disaster areas serve as the main living places for local residents. Therefore, efficient utilization of the debris flow disaster land is one of the most important ways for rural development. Through field survey in the upper reaches of Fujiang River, it is found that the debris flow disaster areas are mainly used as arable land, forest land and construction land, which account for 41.5%, 32.8% and 12.1% respectively. And the total acreage of the 42 debris flow disaster areas is 2.47 km2, and the potential usable land area is 2.12 km2, accounting for 86% of the total survey areas, which means a highly potential land utilization. Three factors were chosen to evaluate the debris flow disaster areas utilization modes, which were soil fertility, water and soil conservation, and engineering geology. The results show that the main potential utilization level of debris flow disaster areas in the upper reaches of Fujiang River was medium and low extent, which account for 88.09%. Therefore, the debris flow disaster areas in the upper reaches of Fujiang River have a broad prospect in utilization. In this paper, the authors took Huangjiaba as an example and attained four debris flow disaster areas utilization use modes, which were village gathering and optimazation mode, modern agricurture mode, water and soil conservation mode and potential civil construction mode. Meanwhile, land utilization advice was proposed for each mode, which can provide some gridance of land development and utilization for local government.
2019 Vol. 6 (5): 124-130 [Abstract] ( 322 ) RICH HTML PDF (3517 KB)  ( 329 )
131 Regionalization and assessment of the geological hazard areas in South Jiangsu
YU Cheng, GE Weiya, JIA Junyuan, XING Huaixue, LEI Ting, LI Liang
DOI: 10.19388/j.zgdzdc.2019.05.15
South Jiangsu is the most developed region in Jiangsu Province, and also the region with the highest population and urban density in China. Geological hazard is one of the important factors affecting the rapid development of South Jiangsu. The authors adopted the analytic hierarchy process (AHP), and established an assessment system by using importance, harmfulness and vulnerability as indexes to classify geological hazard areas in South Jiangsu. On the basis of regionalization, the authors estimated the influence of social and economic factors on the harmfulness of geological hazard. South Jiangsu was divided into two key prevention and control areas--ground subsidence area and landslide collapse area, and the other areas were general prevention and control areas. The assessment results have great reference for the prevention and control of geological hazard in South Jiangsu.
2019 Vol. 6 (5): 131-136 [Abstract] ( 393 ) RICH HTML PDF (3451 KB)  ( 417 )
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