Simulated impacts of irrigation on evapotranspiration in a strongly exploited region: a case study of the Haihe River basin, China

Lei, Huimin; Yang, Dawen; Yang, Hanbo; Yuan, Zaijian; Lv, Huafang

doi:10.1002/hyp.10402

Cited by 33 publications

(30 citation statements)

References 51 publications

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“…Irrigation is supposed to induce TWS depletion when the basin is regarded as one unit, but the situation becomes complicated for spatial TWS variations. Currently, the irrigation effects are mainly investigated by using sensitivity studies through multiple sets of numerical experiments (Lei et al, ; Zhang et al, ; Zou et al, ). Given that the collected irrigation‐induced TWSC (TWSC IRR ) data derived from Döll et al () spanned from 1960 to 2009, and the studied period was 2003–2010, it was assumed that the TWSC IRR trends were the same between 2003–2009 and 2003–2010.…”

Section: Resultsmentioning

confidence: 99%

Quantitative Analysis of Terrestrial Water Storage Changes Under the Grain for Green Program in the Yellow River Basin

et al. 2019

JGR Atmospheres

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Afforestation‐induced changes in water resources have attracted worldwide attention. However, a clear picture of quantitative attribution of terrestrial water storage (TWS) variation from hydroclimatic and anthropogenic factors is still lacking. In this study, a quantitative analysis of TWS variation was conducted in the Yellow River basin of China under the Grain for Green project with consideration of irrigation. The results showed that the TWS has decreased (increased) more and more quickly (slowly) in the Loess Plateau (headwater region). The TWS increase corresponded to increased runoff and soil moisture in the headwaters, and the TWS depletion corresponded to decreased runoff and groundwater in the Loess Plateau and downstream regions. Regarding the TWS change (TWSC), it exhibited a negative trend across the basin. The increase in evapotranspiration (ET) dominated the basin‐averaged TWSC reduction, while the increase in ET was highly related to the increases in vegetation cover and irrigation water use. For spatial TWSC variations, the value of precipitation minus ET could account for most changes in TWSC, except for those in the headwater region and a region near the internally drained area. The increased vegetation coverage, which can affect multiple hydrological processes, played an important role in these two excluded regions. Importantly, the irrigation‐induced TWSC was considerable and varied with different irrigation water sources (i.e., surface water and groundwater). Overall, the impacts of afforestation and irrigation on TWS are sufficiently important. The research in this study can provide guidance for the water resource management during revegetation efforts.

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Section: Resultsmentioning

confidence: 99%

Quantitative Analysis of Terrestrial Water Storage Changes Under the Grain for Green Program in the Yellow River Basin

et al. 2019

JGR Atmospheres

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“…In general, ET GWB matches reasonably well with ET OWB , whereas both GLDAS and MODIS indicate that the discrepancies among ET estimates are consistent with local water use practices. ET GWB has the double‐peak pattern in May and August similar to ET OWB , which is closely related to crop rotation between maize (June–October) and wheat (October–June) [ Cao et al ., ; Lei et al ., ; Lei and Yang , ; Liu et al ., ]. Wheat production relies heavily on groundwater‐fed irrigation [ Yang et al ., ], especially during the grain heading to filling stages (April and May) which accounts for 57% of annual total water consumptions [ Liu et al ., ].…”

Section: Resultsmentioning

confidence: 99%

Detection of human‐induced evapotranspiration using GRACE satellite observations in the Haihe River basin of China

Pan

Zhang

Gong

et al. 2017

Geophysical Research Letters

152

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Regional evapotranspiration (ET) can be enhanced by human activities such as irrigation or reservoir impoundment. Here the potential of using Gravity Recovery and Climate Experiment (GRACE) terrestrial water storage data in water budget calculations to detect human‐induced ET change is investigated over the Haihe River basin of China. Comparison between GRACE‐based monthly ET estimate (2005–2012) and Global Land Data Assimilation System (GLDAS)‐modeled ET indicates that human‐induced ET due to intensive groundwater irrigation from March to May can only be detected by GRACE. GRACE‐based ET (521.7 ± 21.1 mm/yr), considerably higher than GLDAS ET (461.7 ± 29.8 mm/yr), agrees well with existing estimates found in the literature and indicates that human activities contribute to a 12% increase in ET. The double‐peak seasonal pattern of ET (in May and August) as reported in published studies is well reproduced by GRACE‐based ET estimate. This study highlights the unique capability of GRACE in detecting anthropogenic signals over regions with large groundwater consumption.

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“…These observations imply that vegetation growth in such biomes can rapidly respond to changes in soil water conditions and thus bring about ET changes through terrestrial transpiration. In YRB cropland, intensive irrigation is used to increase crop production [ Lei et al ., ], which alleviates drought stress in cropland and in turn supports crop evapotranspiration [ Haddeland et al ., ; Tang et al ., ]. These observations explain the observed higher RC NDVI in summer than in spring in the western and central YRB and exemplify the divergence in the seasonally varying interactive regulation of water supply and vegetation growth on regional ET in different biomes.…”

Section: Discussionmentioning

confidence: 99%

Seasonal divergence in the sensitivity of evapotranspiration to climate and vegetation growth in the Yellow River Basin, China

Pei

et al. 2017

JGR Biogeosciences

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Seasonal variations in terrestrial evapotranspiration (ET) in the Yellow River Basin (YRB) have crucial impacts on the seasonal trajectories of the regional water cycle, vegetation growth, and local climate feedback. However, the possibly divergent roles of climate and vegetation growth variations in controlling seasonal ET patterns remain poorly quantified. This study therefore quantifies the interannual sensitivity and attribution of ET to climate and vegetation growth variations in different seasons and different biomes in the YRB in China between 1982 and 2011, using the satellite‐derived normalized difference vegetation index (NDVI), FLUXNET‐based upscaled ET, and concurrent climate data. The results reveal a clear seasonal divergence in the interannual sensitivity of ET to climate and vegetation growth variations in the YRB. Interannual precipitation and NDVI variations play a dominant role in controlling seasonal ET variations in the YRB, with temperature having a marginal effect. Interannual ET sensitivity to precipitation weakens with an increasing mean annual precipitation gradient in almost all seasons, especially in summer and autumn. More importantly, a seasonally varying role of vegetation growth in mediating seasonal ET was discovered, and a crucial role of late‐growing‐season vegetation growth in controlling the seasonal trajectory of regional ET was explicitly identified. These results suggest that ongoing intensive vegetation restoration has crucial impacts on seasonal water‐cycle patterns and consequent terrestrial‐atmospheric biogeochemical feedback in the YRB.

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Simulated impacts of irrigation on evapotranspiration in a strongly exploited region: a case study of the Haihe River basin, China

Cited by 33 publications

References 51 publications

Quantitative Analysis of Terrestrial Water Storage Changes Under the Grain for Green Program in the Yellow River Basin

Quantitative Analysis of Terrestrial Water Storage Changes Under the Grain for Green Program in the Yellow River Basin

Detection of human‐induced evapotranspiration using GRACE satellite observations in the Haihe River basin of China

Seasonal divergence in the sensitivity of evapotranspiration to climate and vegetation growth in the Yellow River Basin, China

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