Land Degradation and Development Processes and Their Response to Climate Change and Human Activity in China from 1982 to 2015

Kang, Jianfang; Zhang, Yaonan; Biswas, Asim

doi:10.3390/rs13173516

Cited by 14 publications

(13 citation statements)

References 45 publications

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“…As a result, decreasing land degradation in these regions was difficult, with 95% of land remaining in its original degraded status (high LDSI). Consistent with the results of previous studies, increases and decreases in land degradation mainly occurred in semi‐arid, dry sub‐humid, and humid regions (IPCC, 2019; Kang et al, 2021; Liu, Jia, et al, 2021). Agricultural land encroachment and the expansion of built‐up land were identified as the leading cause of land degradation, with localized accelerated urbanization further promoting land degradation.…”

Section: Discussionsupporting

confidence: 91%

“…The use of land cover change within the land degradation assessment can only provide an indication of the land quantity degradation and not an in‐depth assessment of land quality (Shao et al, 2020). The multi‐index modelling approach may be an optimal approach for assessing land degradation (Mao et al, 2018; Mariano et al, 2018; 2022; Wu et al, 2022), for example, by constructing a new comprehensive index (Jiang et al, 2022; Kang et al, 2021; Lu et al, 2022; Bai et al, 2022). In general, the present study proposes a novel index for land degradation monitoring from the perspectives of vegetation cover, vegetation productivity, and soil quality.…”

Section: Discussionmentioning

confidence: 99%

“…Northern China has a high spatial heterogeneity of land cover, with many factors contributing to land degradation, including vegetation degradation, wetland shrinkage, soil erosion, salinization, and sandification. Land degradation seriously restricts the regional ecosystem health and sustainable development (Kang et al, 2021). Therefore, there is an increased need for rapid and accurate monitoring of changes in land degradation and the characterization of the underlying drivers.…”

Section: Introductionmentioning

confidence: 99%

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Is land degradation worsening in Northern China? Quantitative evidence and enlightenment from satellites

et al. 2023

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Land degradation has become an urgent environmental issue globally. The complexity of land degradation hinders its quantification and monitoring, which is needed to realize the sustainable development of land resources. This study constructed a comprehensive index—land degradation status index (LDSI), which integrates in fractional vegetation cover (FVC), net primary productivity (NPP), albedo, and modified temperature vegetation drought index (MTVDI) based on spatial principal component analysis (SPCA). Land degradation was then identified by the dynamics of land degradation status during 2001–2018. This study investigated the spatio‐temporal process and driving mechanism of land degradation in Northern China. The result indicates that: (1) LDSI had a better monitoring performance compared with normalized difference vegetation index (NDVI), (2) although some degraded land had been effectively rehabilitated (17.11%), a highly clustered spatial distribution of land degradation status remained, challenging to break, (3) localized land degradation had expanded (1.063%), mainly in semiarid (0.481%), dry sub‐humid (0.289%), and humid (0.187%) regions, and (4) differences in climate, environmental backgrounds, and human activities were driven land degradation status and process. This study also assessed the effectiveness of ecological projects implemented by the Chinese government. The in‐depth understanding of the change regularity and influencing mechanism in land degradation status and process can provide a scientific basis for formulating ecological policies based on local conditions.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Is land degradation worsening in Northern China? Quantitative evidence and enlightenment from satellites

et al. 2023

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“…However, interference from human activities complicates the ecological environment and hydrological cycle in the region (Yang et al, 2004;Li et al, 2018;Guo et al, 2022). Therefore, evaluation of the extent and impacts of human activities on hydrological processes and the ecological environment, as well as shaping and preserving ecological stability in the basins under new water and sediment conditions associated with water conservancy projects, are gaining increasing attention in basin ecology and hydrology studies (Wen et al, 2022;Kang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Variation characteristics of hydrological response to water conservancy construction in the Qinhe River Basin of the Loess Plateau, China

Guo

Wang

Zhou

et al. 2023

Preprint

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Investigating the response characteristics of various hydrological factors to the construction of water conservancy projects and evaluating their impact on the ecological environment is crucial for ecological protection and restoration in the Loess Plateau, China with a complex environment. In this study, we employed a geomorphology-based hydrological model to simulate the hydrological elements of the Qinhe River Basin in the Loess Plateau. Additionally, we explored the response characteristics of the water cycle and hydrological processes to the construction of reservoirs in the basin. We also examined multiyear changes in peak flood volume and sediment discharge during flood seasons influenced by reservoirs. A thorough evaluation of the simulation results indicated their reliability. The sub-basins hosting reservoirs initially showed an increase in evaporation, followed by a decrease. During the change periods, both runoff and soil water decreased, but remained higher than the mean values for the basin during the same period. The Normalized Difference Vegetation Index of sub-basins associated with five reservoirs was significantly higher than the mean value for the basin during the same period. The peak flood volume and sediment discharge in the basin were characterized by decreasing trends, with the latter showing weak sustainability. The value of each index for a sub-basin associated with a reservoir was higher than the average value for the basin. The construction and operation of reservoirs had a positive impact on the ecology of the basin. Water and soil conservation measures, including sediment regulation and storage using reservoirs, significantly decreased water-related disasters and soil erosion in the basin. This study provides a scientific basis for the design of water conservancy projects and ecological governance in the basin.

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“…Wind erosion is one of the most serious environmental issues in many arid and semi-arid regions of the world, which is the main cause of land degradation and desertification [1,2]. In China, about one-third of the territory, which is distributed in the arid region, is suffering from serious land desertification [3]. Wind erosion is a complex process that is affected by a large number of factors, including climate conditions, soil properties, land surface characteristics, and land-use practice [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Variability of Wind Erosion Climatic Erosivity and Their Relationships with Large-Scale Atmospheric Circulation in Xinjiang, China

et al. 2022

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Xinjiang has a serious wind erosion problem due to its fragile ecological condition and sensitivity to climate change. Wind erosion climatic erosivity is a measure of climatic factors influencing wind erosion; evaluating its spatiotemporal variations and relationship with the large-scale circulation pattern can contribute to the understanding of the climate change effect on wind erosion risk. Thus, this study quantified the wind erosion climatic erosivity and examined the connections between climatic erosivity and climate indices using trend analysis, geo-statistical analysis, and cross-wavelet analysis based on the observed daily meteorological data from 64 weather stations in Xinjiang, China during 1969–2019 (50 years). The results indicated that the climatic erosivity showed a significant downward trend at seasonal and annual scales over the past 50 years. Strong seasonality in the C-factor was found, with its highest values in the spring and summer and its lowest values in the winter. The average climatic erosivity was weaker during El Niño events than during La Niña events. The impact of El Niño events on climatic erosivity in Xinjiang continued from the beginning of the event to two months after the end of the events. The La Niña events had a lag effect on the climatic erosivity in Xinjiang, with a lag period of 4 months. From a statistical perspective, the El Niño-Southern Oscillation (ENSO), North Atlantic Oscillation (NAO), and Arctic Oscillation (AO) indices showed relationships to the climatic erosivity in Xinjiang in terms of their correlation and periodicity. The relationships between the climatic erosivity and ENSO were not clearly positive or negative, with many correlations advanced or delayed in phase. The NAO and AO indices showed a consistent in-phase relationship with climatic erosivity on significant bands, whereas the profound mechanisms involved in this require further study. The results of this study provide a preliminary perspective on the effect of large-scale atmospheric circulation on wind erosion risk in arid and semi-arid regions.

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Land Degradation and Development Processes and Their Response to Climate Change and Human Activity in China from 1982 to 2015

Cited by 14 publications

References 45 publications

Is land degradation worsening in Northern China? Quantitative evidence and enlightenment from satellites

Is land degradation worsening in Northern China? Quantitative evidence and enlightenment from satellites

Variation characteristics of hydrological response to water conservancy construction in the Qinhe River Basin of the Loess Plateau, China

Dynamic Variability of Wind Erosion Climatic Erosivity and Their Relationships with Large-Scale Atmospheric Circulation in Xinjiang, China

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