Surface response and subsurface features during the restriction of groundwater exploitation in Suzhou (China) inferred from decadal SAR interferometry

Shi, Guo Qing; Ma, Peifeng; Hu, Xie; Huang, Bo; Lin, Hui

doi:10.1016/j.rse.2021.112327

Cited by 27 publications

(17 citation statements)

References 81 publications

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“…To investigate the temporal behavior of the multi‐annual deformation, we use an exponential model

a (e^{b \cdot t} - 1)

to describe its first‐order approximation (Chaussard et al., 2014; Hu et al., 2018; 2020; Shi et al., 2021), where d ( t ) is the cumulative displacement in meters, t is the cumulative time in years, a characterizes the magnitude of the displacements, and b emphasizes the high orders of derivative (see Supplement Information). The deployment of this model reports a positive magnitude coefficient a and a negative exponent b , suggesting a decreasing time series with decaying rates.…”

Section: Resultsmentioning

confidence: 99%

“…The consequent characteristic time scales for stabilization

t_{s t a} = (||, \ln (\frac{γ \bar{v}}{a b^{2}}) / b)

, where γ is the assumed fraction of the present‐day velocity

\overset{v}{true}

. Here the time required for the velocity to diminish to, say, 5% of the present‐day rates (e.g., Shi et al., 2021) ranges between 3 and 8.5 years where the extensometers clustered crossing a local depression (Figure ). The largest rates occur at the longitudinal middle of the gentle slope, agreeing with the behaviors of mass wasting such as landslides.…”

Section: Resultsmentioning

confidence: 99%

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Remote Sensing Characterization of Mountain Excavation and City Construction in Loess Plateau

Xue

Yang³

et al. 2021

Geophysical Research Letters

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The population growth and urban expansion aggravate the tension between human and ecological environment, especially for the naturally fragile environments. The Loess Plateau in the vast mid-north China, including Shaanxi, Gansu, and Sichuan Provinces, covers an area of 624,641 km 2 (Wang, 2017). The loess is composed of million-year-old thick deposits of windblown dust and silt, which are subject to disaggregation under harsh climatic and soil conditions. The natural and anthropogenic deforestation has accelerated the erosion, leading to various geological hazards such as droughts and floods, monsoonal summertime landslides, and springtime sandstorms.Although the early civilizations heavily relied on agriculture benefiting from fertile soils, the intensive soil erosion and channel incision have transformed 70% of the original flat plateau into the hilly gully landscape over thousands of years (Fu et al., 2017). Local farmers were in poverty as their efforts can hardly be paid off due to inappropriate soil conditions and multihazard scenarios. To mitigate soil erosion and desertification, as well as to restore the forest landscape for a sustainable development in northern China, the government dedicated to the Grain for Green Program (a.k.a., Conversion of Cropland to Forest Program) during 1999-2008, along with several nationwide campaigns launched in late 1990s, such as the Natural Forest Protection Program and the Sloping Land Conversion Program

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“…To investigate the temporal behavior of the multi‐annual deformation, we use an exponential model

a (e^{b \cdot t} - 1)

Section: Resultsmentioning

confidence: 99%

“…The consequent characteristic time scales for stabilization

t_{s t a} = (||, \ln (\frac{γ \bar{v}}{a b^{2}}) / b)

, where γ is the assumed fraction of the present‐day velocity

\overset{v}{true}

Section: Resultsmentioning

confidence: 99%

Remote Sensing Characterization of Mountain Excavation and City Construction in Loess Plateau

Xue

Yang³

et al. 2021

Geophysical Research Letters

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“…The thickness of the Quaternary sediments is larger than 150 m according to the borehole materials, and the phreatic aquifer with thickness ranging from 3 to 7 m is the layer closely related to human activities (Figure 2). The aquifer is recharged from precipitation, river infiltration, and irrigation; in the meantime, its discharge mainly occurs through run off to rivers and evaporation since restrictions on groundwater exploitation have been imposed by the government since 1997 [45]. As an interactive area of Jiangsu, Zhejiang Provinces and Shanghai metropolis, this area is one of the most developed regions in China.…”

Section: Study Areamentioning

confidence: 99%

Assessment of Groundwater Quality Using APCS-MLR Model: A Case Study in the Pilot Promoter Region of Yangtze River Delta Integration Demonstration Zone, China

Chen

Zhou

et al. 2023

Water

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Groundwater contaminant source identification is an endeavor task in highly developed areas that have been impacted by diverse natural processes and anthropogenic activities. In this study, groundwater samples from 84 wells in the pilot promoter region of the Yangtze River Delta integration demonstration zone in eastern China were collected and then analyzed for 17 groundwater quality parameters. The principal component analysis (PCA) method was utilized to recognize the natural and anthropogenic aspects impacting the groundwater quality; furthermore, the absolute principal component score-multiple linear regression (APCS-MLR) model was employed to quantify the contribution of potential sources to each groundwater quality parameter. The results demonstrated that natural hydro-chemical evolution, agricultural activities, domestic sewage, textile industrial effluent and other industrial activities were responsible for the status of groundwater quality in the study area. Meanwhile, the contribution of these five sources obtained by the APCS-MLR model were ranked as natural hydro-chemical evolution (18.89%) > textile industrial effluent (18.18%) > non-point source pollution from agricultural activities (17.08%) > other industrial activities (15.09%) > domestic sewage (4.19%). It is believed that this contaminant source apportionment result could provide a reliable basis to the local authorities for groundwater pollution management.

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“…The exponential function model [11][12][13] assumes that the settlement rate decreases along the exponential curve with time. The model is expressed as follows:…”

Section: Exponential Function Modelmentioning

confidence: 99%

Settlement Prediction of Reclaimed Coastal Airports with InSAR Observation: A Case Study of the Xiamen Xiang’an International Airport, China

Xiong

Deng²,

Feng

et al. 2022

Remote Sensing

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Many coastal cities reclaim land from the sea to meet the rapidly growing demand for land caused by population growth and economic development. Settlement in reclaimed land may delay construction and even damage infrastructures, so accurately predicting the settlement over reclaimed areas is important. However, the limited settlement observation and ambiguous final settlement estimation affect accurate settlement prediction in traditional methods. This study proposes a new strategy to solve these problems by using the Multitemporal Interferometric Synthetic Aperture Radar (MT-InSAR) method and takes the Xiamen Xiang’an International Airport, built on reclaimed land, as an example. The MT-InSAR is adopted to process the Sentinel-1 images to obtain the settlement history of the study area. The results show that settlement mainly occurs in the reclaimed areas, with the maximum average settlement rate exceeding 40 mm/y. We use the statistical properties of curve fitting to choose the best curve model from several candidate curve models to predict the settlement time series. The Asaoka method is used to identify the critical state between settlement and stability. We predict the consolidation time of the whole study area and reveal that the deformation rate is positively correlated with the consolidation time. The maximum remaining settlement time is over ten years since 24 December 2019. Therefore, manual compaction operations can be carried out to speed up settlement in the areas that need a long time to consolidate. The proposed method can be used to predict the settlement of similar reclaimed areas, and the predicted results can provide a reference for engineering construction.

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Surface response and subsurface features during the restriction of groundwater exploitation in Suzhou (China) inferred from decadal SAR interferometry

Cited by 27 publications

References 81 publications

Remote Sensing Characterization of Mountain Excavation and City Construction in Loess Plateau

Remote Sensing Characterization of Mountain Excavation and City Construction in Loess Plateau

Assessment of Groundwater Quality Using APCS-MLR Model: A Case Study in the Pilot Promoter Region of Yangtze River Delta Integration Demonstration Zone, China

Settlement Prediction of Reclaimed Coastal Airports with InSAR Observation: A Case Study of the Xiamen Xiang’an International Airport, China

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