Isotopic signatures of precipitation, surface water, and groundwater interactions, Poyang Lake Basin, China

Zhan, Lucheng; Chen, Jiansheng; Zhang, Shiyin; Li, Ling; Huang, Dan; Wang, Tao

doi:10.1007/s12665-016-6081-8

Cited by 53 publications

(36 citation statements)

References 48 publications

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“…However, vegetation greenness continued to increase in the Poyang Lake watershed. The reason is that the soil and the shallow groundwater has a positive effect on new vegetation growth because the Poyang Lake watershed is in a humid region where the shallow groundwater is plentiful [48] and where the watershed management projects were effective [2,22].…”

Section: Discussionmentioning

confidence: 99%

Increased Vegetation Greenness Aggravates Water Conflicts during Lasting and Intensifying Drought in the Poyang Lake Watershed, China

Tang

Cai

Gong

et al. 2018

Forests

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An increase in vegetation greenness can improve ecosystem productivity, but also reduce the water supply, creating the potential for conflicting water demands between ecosystems and humans. This problem has been well-assessed and is most evident in dry environments. However, in humid regions, the potential effects of vegetation greenness on water yields under drought conditions are not well understood. To address this gap, we focused on the Poyang Lake watershed in the humid region of southern China. Based on the Standardized Precipitation Evapotranspiration Index and a satellite-derived leaf area index dataset during the growing seasons of 1984 to 2013, several typical dry growing seasons were selected as the study conditions. An existing Water Supply Stress Index model was modified to investigate how the changes in vegetation greenness affected water yield and to explore potentially conflicting water demands between ecosystems and humans under drought conditions. Our results showed that an increase of 20-80% in vegetation greenness generally resulted in a reduction of 3-27% in water yield under drought conditions. Large reductions in water yield mainly were observed in forested areas due to large increases in forest greenness. Moreover, increased vegetation greenness caused a 2 to 3 times greater reduction in water yield during continuing and intensifying droughts than during a short moderate drought period. Thus, in this study, during continuing and intensifying droughts, increased vegetation greenness can cause or aggravate water conflicts in sub-watersheds with high forest cover and high human water demands. Therefore, given the increasing frequency of extreme climatic events, afforestation with a targeted approach should be implemented as it would provide the most benefits. In addition, selective harvesting in forested areas with high density could be an effective strategy to maintain water supply in humid regions.

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Section: Discussionmentioning

confidence: 99%

Increased Vegetation Greenness Aggravates Water Conflicts during Lasting and Intensifying Drought in the Poyang Lake Watershed, China

Tang

Cai

Gong

et al. 2018

Forests

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“…With reference to the definition of the meteoric water line (MWL) and local MWL (LMWL; Dansgaard, 1964;Craig, 1961), Gibson, Edwards, and Bursey (1993) defined the linear relationship between δ 2 H and δ 18 O in an evaporating water body as the EL, and the EL in different regions as the local EL (LEL). By comparing LEL with LMWL, it is possible to distinguish different recharge sources of water bodies (Zhan et al, 2016) and to assess the contribution of different hydrometeorological conditions to the fractionation of the stable isotopes of water (Zhang, Yang, Niu, & Wang, 2009;Gibson et al, 2016).…”

Section: El Of the Lake Watermentioning

confidence: 99%

“…The stable isotopic composition of lake water and its variations can be used to estimate components of the water budget, such as lake evaporation (Brooks et al, ; Mayr et al, ), leakage, and groundwater inflow (Shaw, Mitchell, & Gammons, ), which are difficult to monitor with traditional methods, and they can also elucidate the relationship between the transformation and replenishment of different water bodies (Ma & Edmunds, ; Zhan et al, ). In addition, the contribution ratio of evaporated water vapour to local atmospheric water vapour can be calculated using water balance and water isotope balance equations (Gat, Bowser, & Kendall, ).…”

Section: Introductionmentioning

confidence: 99%

“…The stable isotopic composition of lake water and its variations can be used to estimate components of the water budget, such as lake evaporation (Brooks et al, 2014;Mayr et al, 2007), leakage, and groundwater inflow (Shaw, Mitchell, & Gammons, 2017), which are difficult to monitor with traditional methods, and they can also elucidate the relationship between the transformation and replenishment of different water bodies (Ma & Edmunds, 2006;Zhan et al, 2016).…”

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confidence: 99%

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Dual effects of precipitation and evaporation on lake water stable isotope composition in the monsoon region

Mingquan

Yao

Luo

et al. 2019

Hydrological Processes

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We present the results of a 3‐year monitoring programme of the stable isotope composition of lake water and precipitation at Taozi Lake, in the East Asian monsoon region of China. Our aims were to reveal the spatiotemporal pattern of variation of stable isotopes in a small closed‐basin lake and to quantitatively determine the impacts of precipitation and evaporation on the stable isotope composition of lake water under a humid monsoon climate. In the time domain, the stable oxygen isotopic ratio of the lake water (δ18OL) exhibited substantial seasonal and interannual variations, but the isotope variations between different precipitation events substantially exceeded seasonal and interannual variations. Compared with the stable isotopes in precipitation, δ18OL was substantially positive and dL was negative. In the space domains, the lake water was homogeneously mixed. Indicated by statistic analyses, precipitation plays a dominant role in dynamic of the lake stable isotope during precipitation events of relatively large magnitude, whereas the effect of evaporation is dominant during smaller precipitation events. Results advance our understanding of the stable isotope change rule in the process of lake water evaporation, and it is helpful to identify the climatic significance recorded in stable isotopic compositions of lake bottom sediments.

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“…By using the mix model of oxygen isotopes, Shen et al [9] applied the direct inference method and iso-source model to evaluate ponded water, soil water and ground water's contributions to rice crop by using stable isotopes of hydrogen and oxygen. Zhan et al used [10] the stable isotopes and hydrological data to analyse the interactions between precipitation, river water, lake water and shallow ground water in Poyang Lake. Zhang [11] analysed water supply sources of soil in Poyang Lake wetland by using stable hydrogen and oxygen isotopes.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Features of Soil-River-Ground-Plants Water Based on Stable Oxygen Isotope in Poyang Lake Wetland

Lin¹,

Deng²,

Tang³

2017

Topics in Civil, Environmental &Amp; Building Engineering (TICEBE)

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Poyang Lake is the largest freshwater lake in China, and the largest single area of habitat for migratory birds. The water level of Poyang Lake was declined continuous, and extreme droughts have frequently occurred in recent years, the structure and function of the wetland ecosystem were destroyed. In this paper, Stable oxygen isotopes was used as a tracer to identify composition of soil water, river water, ground water, and plants water. The focus was on characterize the variation with depth of the stable oxygen isotope composition and identifying the main sources of oxygen in soil water, ground water, river water and plants water, understanding the mechanisms of water movement among them. Soil water sampled at 10 cm intervals over the top 100 cm at two sections in the Poyang Lake wetland, and water samples collected from the plants, river water and ground water, were analysed for stable oxygen isotope composition, exploring the recharge and discharge of relationship between them. The results shown that the values of δ18O at depth of 0~30cm at section I were declined with increasing soil depth, the value of δ18O at depth of 0~40cm at section II had rare variation with increasing soil depth. The groundwater supply at section I was mainly influenced by precipitation, at section II was by precipitation and river water. The average value of δ18O in the domain species plants leaves of phalaris arundinacea, crex cinerascens, and phragmites communis was -0.9‰, -4.23‰, -5.25‰ respectively.

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Isotopic signatures of precipitation, surface water, and groundwater interactions, Poyang Lake Basin, China

Cited by 53 publications

References 48 publications

Increased Vegetation Greenness Aggravates Water Conflicts during Lasting and Intensifying Drought in the Poyang Lake Watershed, China

Increased Vegetation Greenness Aggravates Water Conflicts during Lasting and Intensifying Drought in the Poyang Lake Watershed, China

Dual effects of precipitation and evaporation on lake water stable isotope composition in the monsoon region

Analysis on Features of Soil-River-Ground-Plants Water Based on Stable Oxygen Isotope in Poyang Lake Wetland

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