Distribution Characteristics of Soil Moisture in the Three Rivers Headwaters Region, China

Cao, Ruixue; Jin, Xin

doi:10.3808/jeil.202100067

Cited by 3 publications

(4 citation statements)

References 27 publications

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“…Based on observation under the simulated warming conditions in the Chengduo station in TRHR, the soil temperature increased by 2.50 ℃ and 1.36 ℃ at the soil depth of 0-15 cm and 15-30 cm, respectively, while the soil water decreased by 0.07% and 0.09% at the soil depth of 0-15 cm and 15-30 cm, respectively (Yao et al, 2019). Cao and Jin (2021) also concluded that soil water is negatively correlated with air temperature and positively correlated with precipitation.…”

Section: Influencing Factors On Soil Water Sources In Different Ablat...mentioning

confidence: 98%

“…Soil water has also been deeply concerned in TRHR. Cao and Jin (2021) analyzed the distribution characteristics of soil water and its relationship with temperature and precipitation in TRHR. The influence of precipitation on soil water in the alpine steppe was greater than that in an alpine meadow, especially in lower-altitude areas (Li et al, 2022) annual mean soil surface temperature by 0.8 °C under climate warming in the sources region of the Yangtze river (Xue et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Soil water sources and its implications on vegetation restoration in the Three-river Headwaters Region during different ablation periods

Li,

Gui,

Zhang

2023

Preprint

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Abstract. Under climate warming, effective restoration and protection of the ecological environment could happen by timely supplementing soil water. So it is crucial to understand the spatial-temporal changes in soil water sources. Two thousand six hundred samples of soil water, precipitation, river water, ground ice, supra-permafrost water, and glacier snow meltwater have been collected from June, August, and September 2020 to quantify the soil water sources in the Three-River Headwater Region under different ablation periods. Results indicated that precipitation, ground ice, and snow meltwater accounted for approximately 72 %, 20 %, and 8 % of soil water during the early ablation period. Snow is completely melted in the heavy and the end of the ablation period, and precipitation contributed to about 90 % and 94 % of soil water, respectively. These recharges also vary markedly with altitude and vegetation type. Various factors influence soil water sources, including temperature, precipitation, vegetation, evapotranspiration, and the freeze-thaw cycle. However, soil water loss will further exacerbate vegetation degradation and pose a significant threat to the ecological security of the “Chinese water tower.” So there is an urgent need to monitor soil water, warn of vegetation degradation associated with soil moisture loss, and identify reasonable water-soil conservation and vegetation restoration patterns.

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Section: Influencing Factors On Soil Water Sources In Different Ablat...mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Soil water sources and its implications on vegetation restoration in the Three-river Headwaters Region during different ablation periods

Li,

Gui,

Zhang

2023

Preprint

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“…The evaluation of the suitability of land space development refers to the suitability of land space for different development and utilization methods, such as urban construction and agricultural production. It is supposed to evaluate the suitability of the land space for urban construction and agricultural production on the basis of evaluating the carrying capacity of resources and environment [3]. The concept of carrying capacity originated in ancient Greece and was originally defined as "the maximum number of organisms that can survive under certain resource and environmental conditions".…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the sustained and rapid development of China's economy and society has caused dislocation and imbalance in the water resources of some regions. It is urgent to take into account the regional water resources occurrence conditions and development-utilization needs in territorial and spatial planning, and to comprehensively ensure that regional economic, social, ecological and other development goals fully adhere to the principle of "determining the city by water, determining the land by water, determining the people by water, and determining the production by water", and constantly strengthen the rigid constraints of water resources [3,4]. It is of great significance to strengthen the rigid constraints of water resources in national land space planning.…”

Section: Introductionmentioning

confidence: 99%

Agricultural Productive Carrying Capacity Improve and Water Optimal Allocation under Uncertainty Based on Remote Sensing Data in Lancang County, Southwest China

Zhang

Yang

2022

Water

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Through the reasonable calculation of water resources, evaluating the irrigation carrying capacity of farmland under the constraints of water resources is crucial for optimizing the spatial distribution of agricultural production and ecology and rationally adjusting the scale of agricultural production. This paper proposes an optimization framework based on Type 2 fuzzy chance-constrained programming (T2FCCP) to solve the problem of regional water resources optimal allocation and evaluation of farmland irrigation carrying capacity under uncertain conditions. To illustrate the applicability of the proposed framework, this paper conducts a case study on Lancang County, Puer City, Yunnan Province. Methods, such as watershed harmony evaluation method, remote sensing data, and shared socioeconomic pathways (SSPs), are applied and integrated into the proposed optimization framework to systematically deal with uncertainties in water resource systems and agricultural systems. The results include the costs and benefits of regional water and soil resources systems, water resources optimal allocation, and crop planting structure results under different SSPs in Lancang County, Puer City. The results also show that the total cost under T2FCCP is about 5% lower than that under fuzzy chance-constrained programming (FCCP) and about 17% lower than that under chance-constrained programming (CCP). By 2025, the water resources carrying capacity of different tributaries in Lancang County, Puer City will increase, and based on the evaluation results of agricultural production irrigation carrying capacity, suggestions are given to ensure agricultural production carrying capacity.

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Soil water sources and their implications for vegetation restoration in the Three-Rivers Headwater Region during different ablation periods

Li,

Gui,

Cui

et al. 2024

Hydrol. Earth Syst. Sci.

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Abstract. Amid global warming, the timely supplementation of soil water is crucial for the effective restoration and protection of the ecosystem. It is therefore of great importance to understand the temporal and spatial variations of soil water sources. The research collected 2451 samples of soil water, precipitation, river water, ground ice, supra-permafrost water, and glacier snow meltwater in June, August, and September 2020. The goal was to quantify the contribution of various water sources to soil water in the Three-Rivers Headwater Region (China) during different ablation periods. The findings revealed that precipitation, ground ice, and snow meltwater constituted approximately 72 %, 20 %, and 8 % of soil water during the early ablation period. The snow is fully liquefied during the latter part of the ablation period, with precipitation contributing approximately 90 % and 94 % of soil water, respectively. These recharges also varied markedly with altitude and vegetation type. The study identified several influencing factors on soil water sources, including temperature, precipitation, vegetation, evapotranspiration, and the freeze–thaw cycle. However, soil water loss will further exacerbate vegetation degradation and pose a significant threat to the ecological security of the “Chinese Water Tower”. It emphasizes the importance of monitoring soil water, addressing vegetation degradation related to soil water loss, and determining reasonable soil and water conservation and vegetation restoration models.

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Distribution Characteristics of Soil Moisture in the Three Rivers Headwaters Region, China

Cited by 3 publications

References 27 publications

Soil water sources and its implications on vegetation restoration in the Three-river Headwaters Region during different ablation periods

Soil water sources and its implications on vegetation restoration in the Three-river Headwaters Region during different ablation periods

Agricultural Productive Carrying Capacity Improve and Water Optimal Allocation under Uncertainty Based on Remote Sensing Data in Lancang County, Southwest China

Soil water sources and their implications for vegetation restoration in the Three-Rivers Headwater Region during different ablation periods

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