Impacts of reservoir operations on multi-scale correlations between hydrological drought and meteorological drought

Wu, Jiefeng; Liu, Zhiyong; Yao, Huaxia; Chen, Xiaohong; Chen, Xingwei; Zheng, Yayuan; He, Yanhu

doi:10.1016/j.jhydrol.2018.06.053

Cited by 107 publications

(67 citation statements)

References 47 publications

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“…Overall, the streamflow variation due to reservoirs is of the greatest importance and has been extensively investigated in the literature. Multiple studies have reported an increased streamflow in dry seasons for water supply and a decreased streamflow in wet seasons for flood control (Lv et al, ; Ngo, Masih, Jiang, & Douven, ; Wu et al, ), which is in line with our finding with respect to a reservoir network. Over a long‐term period, a slightly decreased streamflow can be observed, which can be attributed to reservoir seepage and evaporation.…”

Section: Discussionsupporting

confidence: 93%

Hydrological impact of a reservoir network in the upper Gan River Basin, China

Dong

Yang

et al. 2019

Hydrological Processes

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A few relatively large reservoirs, hundreds of small reservoirs, and numerous farm dams were built in the upper Gan River Basin, China. The operation of such a reservoir network can serve as a significant source of variability in the local hydrological regime and should be included in research to better understand the interaction between multiple hydrological processes and watershed management. In this study, a reservoir network module that included reservoirs of multiple sizes was developed and fully integrated into the coupled land surface and distributed hydrologic model system (CLHMS), for a detailed description of the hydrological impact of a reservoir network. A generalized release scheme was employed to determine the outflow of both large and small reservoirs. The integrated model was then evaluated against observations and reanalysis data, which indicate that the model can reasonably reconstruct the reservoir operation, streamflow, and other hydrological variables. Results quantitatively demonstrate that a reservoir network can result in an increased streamflow in dry seasons, a decreased streamflow in wet seasons, a generally larger groundwater discharge, higher groundwater level, a slightly damper soil condition, and a larger amount of evapotranspiration at the basin level. With the integrated model, it is feasible to achieve more sustainable watershed planning and management.

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Section: Discussionsupporting

confidence: 93%

Hydrological impact of a reservoir network in the upper Gan River Basin, China

Dong

Yang

et al. 2019

Hydrological Processes

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“…The calculation steps of the SPI method, which are used frequently in meteorological drought analysis, are as follows: A probability distribution function is fitted to the long‐term (minimum 30 years) precipitation data. The gamma distribution function is expressed as the most suitable distribution function of the precipitation data in most of the studies (Niu et al ., ; Wu et al ., ). Cumulative probabilities are calculated by the fitted probability distribution function. The calculation steps of the parameters and cumulative probabilities of the Gamma distribution function can be found in detail in the relevant study (Gumus and Algin, ). Cumulative probabilities are converted to SPI values with a mean of 0 and a standard deviation of 1 by using Equations 1 and 2:

t = ({, \begin{array}{c} \sqrt{\ln \frac{1}{{((), H ((), x))}^{2}}} & 0 < H ((), x) \leq 0.5 \\ \sqrt{\ln \frac{1}{{((), 1 - H ((), x))}^{2}}} & 0.5 \leq H ((), x) \leq 1 \end{array})

italicSPI = ({, \begin{array}{c} - ((), t - \frac{c_{0} + c_{1} t + c_{2} t^{2}}{1 + d_{1} t + d_{2} t^{2} + d_{3} t^{3}}) & 0 < H ((), x) \leq 0.5 \\ + ((), t - \frac{c_{0} + c_{1} t + c_{2} t^{2}}{1 + d_{1} t + d_{2} t^{2} + d_{3} t^{3}}) & 0.5 \leq H ((), x) < 1 \end{array})

where H ( x ) is the cumulative probability of observed precipitation according to the fitted probability distribution function; and c 0 , c 1 , c 2 , d 1 , d 2 and d 3 are the constants with values of 2.515517, 0.802853, 0.010328, 1.1432788, 0.189269 and 0.01308, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…; Tirivarombo et al ., ). Precipitation data are used for the determination of meteorological droughts using the SPI method (Mo, ; Wang et al ., ; Stagge et al ., ; Wu et al ., ). However, in the SPEI method, drought characteristics are determined by using precipitation and potential evapotranspiration data.…”

Section: Introductionmentioning

confidence: 97%

“…The standardized precipitation index (SPI) (McKee et al, 1993) and the standardized precipitation evapotranspiration index (SPEI) (Vicente-Serrano et al, 2010) of the meteorological drought indices, and the standardized runoff index (SRI) (Shukla and Wood, 2008) of the hydrological drought indices are frequently used in the determination of drought characteristics (Oloruntade et al, 2017;Wu et al 2017a;Tirivarombo et al, 2018). Precipitation data are used for the determination of meteorological droughts using the SPI method (Mo, 2008;Wang et al, 2011;Stagge et al, 2015;Wu et al, 2018). However, in the SPEI method, drought characteristics are determined by using precipitation and potential evapotranspiration data.…”

Section: Introductionmentioning

confidence: 99%

“…They concluded that seasonal and annual hydrological droughts were more affected by ENSO events in the southeastern part of the plateau than in the northwestern region. Wu et al (2018) calculated hydrological and meteorological droughts with the SSI and SPI methods on one, three, six and 24 month timescales and examined the effects of drought with the Xinfengiinag reservoir operation. The results showed that hydrological and meteorological drought characteristics were different under normal conditions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterizing meteorological and hydrological droughts: A case study of the Gediz River Basin, Turkey

Kumanlıoğlu

2019

Meteorological Applications

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The determination of the drought characteristics of a basin that feeds a reservoir and provides water for agricultural irrigation or energy production is important for the sustainable management of reservoirs. In the present study, the meteorological and hydrological droughts of the upper basins feeding the Demirköprü Reservoir in the Gediz River Basin of Turkey are examined over one, three, six and 12 month timescales. The methods used include the standardized precipitation index (SPI) and the standardized precipitation evapotranspiration index (SPEI) for defining meteorological droughts, and the standardized runoff index (SRI) method for defining hydrological droughts. The results show that the wet periods are dominant in the water years before 1984, and the dry periods occurred more frequently and were longer after this year in the basin. Owing to a temperature increase, it is determined that the effect of potential evapotranspiration losses on drought events has increased in the years after 2000, and the droughts that occurred after this year have happened more intensively in the basin. The results also show that both the meteorological and hydrological drought trends of the basin are prone to dry conditions and no that change is expected in these trends in the near future. Considering the predicted global climate changes, the results provide a source for describing the characteristics of the meteorological and hydrological droughts observed in the basins for the sustainable management of reservoirs which have a large irrigation area or energy production.

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Assessment of changes in severity of compound drought and saltwater intrusion events based on a multi‐index approach in Pearl River estuary

Li,

Liu,

et al. 2023

Hydrological Processes

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Global warming alters the inherent variability of climate variables and induces more frequent extremes of hydroclimatic compound events with substantial impacts. The concurrence of hydrological drought and saltwater intrusion in the estuary can have devastating effects on agricultural production, water security, and ecological health. In this study, the compound drought and saltwater intrusion extreme indices, including the Blend Drought and Saltwater intrusion Index (BDSI), the Compound drought and Saltwater intrusion Index (CDSI) and the Standardized Drought and Saltwater intrusion Index (SDSI), were constructed to monitor compound extremes in the critical zone of Pearl River Estuary during the dry season from 1999 to 2016. The results reveal that the three compound indices can effectively depict different aspects of compound drought and saltwater intrusion extreme events in the critical zone of Pearl River Estuary. Among the three indices, the SDSI performed best in depicting compound drought‐saltwater intrusion events, while the BDSI outperformed the other indices in depicting high value of Standardized Runoff Index (SRI) and Standardized Saltwater intrusion Index (SSI), and the CDSI outperformed the other indices in depicting low values of SRI and SSI. Using those developed compound indices, we found that the frequency of abnormal and moderate compound drought‐saltwater intrusion events increased from 9.26% to 12.03% during the period of 1999–2016, while severe, extreme and exceptional compound drought‐saltwater intrusion events were rare.

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Impacts of reservoir operations on multi-scale correlations between hydrological drought and meteorological drought

Cited by 107 publications

References 47 publications

Hydrological impact of a reservoir network in the upper Gan River Basin, China

Hydrological impact of a reservoir network in the upper Gan River Basin, China

Characterizing meteorological and hydrological droughts: A case study of the Gediz River Basin, Turkey

Assessment of changes in severity of compound drought and saltwater intrusion events based on a multi‐index approach in Pearl River estuary

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