scholarly journals Recent Ground Subsidence in the North China Plain, China, Revealed by Sentinel-1A Datasets

2020 ◽  
Vol 12 (21) ◽  
pp. 3579
Author(s):  
Min Shi ◽  
Huili Gong ◽  
Mingliang Gao ◽  
Beibei Chen ◽  
Shunkang Zhang ◽  
...  
Keyword(s):  
Synthetic Aperture Radar ◽  
Land Subsidence ◽  
North China Plain ◽  
North China ◽  
Synthetic Aperture ◽  
Groundwater Depletion ◽  
Integrated Analysis ◽  
The North ◽  
The North China Plain ◽  
Aperture Radar

Groundwater resources have been exploited and utilized on a large scale in the North China Plain (NCP) since the 1970s. As a result of extensive groundwater depletion, the NCP has experienced significant land subsidence, which threatens geological stability and infrastructure health and exacerbates the risks of other geohazards. In this study, we employed multi-track Synthetic Aperture Radar (SAR) datasets acquired by the Sentinel-1A (S1A) satellite to detect spatial and temporal distributions of surface deformation in the NCP from 2016 to 2018 based on multi-temporal interferometric synthetic aperture radar (MT-InSAR). The results show that the overall ground displacement ranged from −165.4 mm/yr (subsidence) to 9.9 mm/yr (uplift) with a standard variance of 28.8 mm/yr. During the InSAR monitoring period, the temporal pattern of land subsidence was dominated by a decreasing tendency and the spatial pattern of land subsidence in the coastal plain exhibited an expansion trend. Validation results show that the S1A datasets agree well with levelling data, indicating the reliability of the InSAR results. With groundwater level data, we found that the distribution of subsidence in the NCP is spatially consistent with that of deep groundwater depression cones. A comparison with land use data shows that the agricultural usage of groundwater is the dominant mechanism responsible for land subsidence in the whole study area. Through an integrated analysis of land subsidence distribution characteristics, geological data, and previous research results, we found that other triggering factors, such as active faults, precipitation recharge, urbanization, and oil/gas extraction, have also impacted land subsidence in the NCP to different degrees.

scholarly journals Flow velocity and nutrients affect CO2 emissions from agricultural drainage channels in the North China Plain

2020 ◽  
Vol 32 (1) ◽  
Author(s):  
Peifang Leng ◽  
Fadong Li ◽  
Kun Du ◽  
Zhao Li ◽  
Congke Gu ◽  
...  
Keyword(s):  
Flow Velocity ◽  
North China Plain ◽  
North China ◽  
Groundwater Depletion ◽  
Agricultural Drainage ◽  
Agricultural Practice ◽  
The North ◽  
The North China Plain ◽  
Groundwater Irrigation ◽  
Drainage Channels

Abstract Background Groundwater is typically over-saturated in CO2 with respect to atmospheric equilibrium. Irrigation with groundwater is a common agricultural practice in many countries, but little is known about the fate of dissolved inorganic carbon (DIC) in irrigation groundwater and its contribution to the CO2 emission inventory from land to the atmosphere. We performed a mesocosm experiment to study the fate of DIC entering agricultural drainage channels in the North China Plain. Specifically, we aimed to unravel the effect of flow velocity and nutrient on CO2 emissions. Results All treatments were emitting CO2. Approximately half of the DIC in the water was consumed by TOC production (1–16%), emitted to the atmosphere (14–20%), or precipitated as calcite (CaCO3) (14–20%). We found that DIC depletion was stimulated by nutrient addition, whereas more CO2 evasion occurred in the treatments without nutrients addition. On the other hand, about 50% of CO2 was emitted within the first 50 h under high flow velocity. Thus, in the short term, high nutrient levels may counteract CO2 emissions from drainage channels, whereas the final fate of the produced biomass (burial versus mineralization to CO2 or even CH4) determines the duration of the effect. Conclusion Our study reveals that both hydrology and biological processes affect CO2 emissions from groundwater irrigation channels. The estimated CO2 emission from total groundwater depletion in the North China Plain is up to 0.52 ± 0.07 Mt CO2 year−1. Thus, CO2 emissions from groundwater irrigation should be considered in regional CO2 budgets, especially given that groundwater depletion is expected to acceleration in the future.

scholarly journals Change of winter wheat planting area and its impacts on groundwater depletion in the North China Plain

2019 ◽  
Vol 29 (6) ◽  
pp. 891-908 ◽  
Author(s):  
Xifang Wu ◽  
Yongqing Qi ◽  
Yanjun Shen ◽  
Wei Yang ◽  
Yucui Zhang ◽  
...  
Keyword(s):  
Winter Wheat ◽  
North China Plain ◽  
North China ◽  
Groundwater Depletion ◽  
The North ◽  
The North China Plain

The Application of PS-InSAR Technology on Land Subsidence in Cangzhou Region

2011 ◽  
Vol 268-270 ◽  
pp. 1934-1939
Author(s):  
Kun Chao Lei ◽  
Hui Li Gong ◽  
Xiao Juan Li ◽  
Bei Bei Chen ◽  
Ji Wei Li ◽  
...  
Keyword(s):  
Synthetic Aperture Radar ◽  
Land Subsidence ◽  
Radar Data ◽  
Ground Movement ◽  
Synthetic Aperture ◽  
Interferometric Synthetic Aperture Radar ◽  
The North ◽  
Permanent Scatterers ◽  
Satellite Radar ◽  
Aperture Radar

Land subsidence in Cangzhou of the North China Plain, has been an ongoing problem for the past four decades (since the later 1970s). With the development of new synthetic aperture radar(SAR)sensors and interferometric synthetic aperture radar(InSAR) techniques, the application of satellite Radar data have enhanced capabilities to detect and monitor ground displacements with centimeter to millimeter precision at greater spatial detail and higher temporal resolution. We use Permanent Scatterers interferometric synthetic aperture radar（PS-InSAR）technology (Hooper, A.2004) to detect and measure ground movement in this area（from2004 to 2007）. Results of the cangzhou region study are reported and the utility of the InSAR methodology is discussed.

Groundwater-derived land subsidence in the North China Plain

2015 ◽  
Vol 74 (2) ◽  
pp. 1415-1427 ◽  
Author(s):  
Haipeng Guo ◽  
Zuochen Zhang ◽  
Guoming Cheng ◽  
Wenpeng Li ◽  
Tiefeng Li ◽  
...  
Keyword(s):  
Land Subsidence ◽  
North China Plain ◽  
North China ◽  
The North ◽  
The North China Plain

scholarly journals Groundwater-abstraction induced land subsidence and groundwater regulation in the North China Plain

2015 ◽  
Vol 372 ◽  
pp. 17-21 ◽  
Author(s):  
H. Guo ◽  
L. Wang ◽  
G. Cheng ◽  
Z. Zhang
Keyword(s):  
Sustainable Development ◽  
Land Subsidence ◽  
North China Plain ◽  
North China ◽  
Groundwater Resources ◽  
Groundwater Abstraction ◽  
Beijing Plain ◽  
The North ◽  
The North China Plain ◽  
Development And Utilization

Abstract. Land subsidence can be induced when various factors such as geological, and hydrogeological conditions and intensive groundwater abstraction combine. The development and utilization of groundwater in the North China Plain (NCP) bring great benefits, and at the same time have led to a series of environmental and geological problems accompanying groundwater-level declines and land subsidence. Subsidence occurs commonly in the NCP and analyses show that multi-layer aquifer systems with deep confined aquifers and thick compressible clay layers are the key geological and hydrogeological conditions responsible for its development in this region. Groundwater overdraft results in aquifer-system compaction, resulting in subsidence. A calibrated, transient groundwater-flow numerical model of the Beijing plain portion of the NCP was developed using MODFLOW. According to available water supply and demand in Beijing plain, several groundwater regulation scenarios were designed. These different regulation scenarios were simulated with the groundwater model, and assessed using a multi-criteria fuzzy pattern recognition model. This approach is proven to be very useful for scientific analysis of sustainable development and utilization of groundwater resources. The evaluation results show that sustainable development of groundwater resources may be achieved in Beijing plain when various measures such as control of groundwater abstraction and increase of artificial recharge combine favourably.

scholarly journals Multiphase chemistry experiment in Fogs and Aerosols in the North China Plain (McFAN): integrated analysis and intensive winter campaign 2018

2021 ◽  
Author(s):  
Guo Li ◽  
Hang Su ◽  
Nan Ma ◽  
Jiangchuan Tao ◽  
Ye Kuang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Physicochemical Properties ◽  
North China Plain ◽  
North China ◽  
Fine Particles ◽  
Integrated Analysis ◽  
The North ◽  
Multiphase Reactions ◽  
The North China Plain ◽  
Chemistry Experiment

High-RH-favored multiphase reactions can significantly change the chemical composition of fine particles and thereby modify their physicochemical properties.

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