Spatio-temporal variations in vegetation cover in Hotan Oasis from 1994 to 2016

Diwen, 董弟文 Dong; Abdirahman·Halik, 阿布都热合曼·哈力克; Dawei, 王大伟 Wang; Shiying, 田世英 Tian

doi:10.5846/stxb201805281167

Cited by 2 publications

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“…Hotan Oasis is a piedmont oasis with limited natural resources such as water, fragile ecology, prominent environmental constraints and resource consumption problems in a typical arid area, Xinjiang Uygur Autonomous Region, China . Additionally, the proportion of agricultural land has increased substantially since 2010 (Dong et al, 2019), causing the edge of the oasis to advance considerably toward the desert. The extent of expansion can be estimated visually from satellite images.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal changes of eco-environmental quality based on remote sensing-based ecological index in the Hotan Oasis, Xinjiang

et al. 2022

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The rapid economic development that the Hotan Oasis in Xinjiang Uygur Autonomous Region, China has undergone in recent years may face some challenges in its ecological environment. Therefore, an analysis of the spatiotemporal changes in ecological environment of the Hotan Oasis is important for its sustainable development. First, we constructed an improved remote sensing-based ecological index (RSEI)

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Section: Introductionmentioning

confidence: 99%

Spatiotemporal changes of eco-environmental quality based on remote sensing-based ecological index in the Hotan Oasis, Xinjiang

et al. 2022

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“…The study area was an arid desert hinterland with a single type of surface vegetation. Combined with the field survey and references [54], we determined the NDVI cumulative image value of 1% equal to the NDV I soil and the NDVI cumulative image value of 99% equal to NDV I veg , which were used to calculate the FVC. Verification of the accuracy of vegetation cover extracted by satellite remote sensing is traditionally conducted using field surveys to quantify vegetation cover by delineating sample plots, which is a time-consuming and labour-intensive method.…”

Section: Calculation and Accuracy Verification Of Vegetation Covermentioning

confidence: 99%

The Impact of Groundwater Burial Depth on the Vegetation of the Dariyabui Oasis in the Central Desert

Bai,

Guo,

Wang

et al. 2023

Sustainability

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Vegetation and groundwater are important components of the ecological environment of oases in desert hinterlands and their relationship is crucial to ecosystem stability. In this study, Sentinel-2 data for 2016–2022 and measured groundwater burial depths were analysed for the Dariyabui Oasis in the hinterland of the Taklamakan Desert. The spatial and temporal changes in vegetation and groundwater burial depth from 2019 to 2022 were analysed based on the image–element dichotomous model of the normalised difference vegetation index, utilising the inverse distance weight interpolation method, cubic curve regression, image–element difference, slope trend analysis, and the Markov transfer matrix for determining the temporal and spatial response law between the two. Finally, the threshold value of groundwater burial depth for different vegetation cover types was clarified. The fractional vegetation cover of the Dariyabui Oasis showed a slight increase from 2016 to 2022. Vegetation in the northwest and southeast of the oasis increased, whereas vegetation decreased in the mid-north and northeast regions; 5.14% of the total area experienced increased coverage, whereas 3.35% experienced decreased coverage. The depth of groundwater in the oasis showed a pattern of gradual increase from the entrance to the end of the oasis, that is, south to north. The depth of groundwater in the oasis from 2019 to 2022 was stable, with a 4-year average depth of 4.1069 m and a maximum fluctuation of 0.4560 m. The interannual changes in the groundwater level showed an increasing trend in January–April, while groundwater levels showed a decreasing trend in May–July and August–October and remained constant in June–July and October–December. Oasis vegetation cover showed a negative correlation with groundwater depth, with a depth interval for the highest low-cover vegetation distribution of 3–6 m, and an ultimate depth threshold of 7 m. The depth interval with the highest medium-cover vegetation distribution was 3–4 m, that with the highest high-cover distribution was 2–4 m, and the ultimate depth threshold was 6 m. The depth of the oasis ranged from 3 to 6 m and the ultimate depth threshold was 7 m.

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Spatio-temporal variations in vegetation cover in Hotan Oasis from 1994 to 2016

Cited by 2 publications

References 0 publications

Spatiotemporal changes of eco-environmental quality based on remote sensing-based ecological index in the Hotan Oasis, Xinjiang

Spatiotemporal changes of eco-environmental quality based on remote sensing-based ecological index in the Hotan Oasis, Xinjiang

The Impact of Groundwater Burial Depth on the Vegetation of the Dariyabui Oasis in the Central Desert

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