Changes in streamflow and sediment discharge and the response to human activities in the middle reaches of the Yellow River

Gao, Peng; Mu, Xingmin; Wang, F.; Li, R.

doi:10.5194/hess-15-1-2011

Cited by 277 publications

(220 citation statements)

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“…They found all three methods created consistent estimates of percent change in mean annual runoff from climate variability and human activities. Lastly, the estimates of human activities on streamflow have been evaluated using land use and land cover (Yang and Tian, 2009;Ma et al, 2010) and general historical information (Gao et al, 2011). In this paper, the influences of precipitation on streamflow were estimated at Guanting Reservoir, Yanchi, and Sanjiadian.…”

Section: Introductionmentioning

confidence: 99%

“…Hydrological processes are increasingly being altered by water infrastructure (Rosenberg et al, 2000), landscape alterations (Gao et al, 2011), and human-induced climate changes from greenhouse gases and aerosols (Barnett et al, 2008). The separation and quantification of climate variation and human impacts on streamflow can be challenging due to the complex interactions between climate, human activities, and hydrological processes.…”

Section: Introductionmentioning

confidence: 99%

“…The separation and quantification of climate variation and human impacts on streamflow can be challenging due to the complex interactions between climate, human activities, and hydrological processes. A range of statistical and modeling techniques have been developed to estimate streamflow changes from climate change and human activities (Li et al, 2007;Barnett et al, 2008;Yang and Tian, 2009;Gautam et al, 2010;Ma et al, 2010;Gao et al, 2011). The impacts of climate variability on hydrologic time-series can be estimated using trend analysis (Lettenmaier et al, 1994;Whitfield and Cannon, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Drivers of drying on the Yongding River in Beijing

Jiang

Wong

et al. 2014

Journal of Hydrology

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s u m m a r yIn recent decades, the Yongding River in Beijing has ceased to flow due to the impact of climate and anthropogenic factors, which has led to severe environmental degradation. The Beijing government is constructing new freshwater ecosystems on the Yongding River to improve environmental conditions for ecosystem services. Clarification is needed on the influence of precipitation and anthropogenic factors on streamflow decline in Beijing. A hydrological time-series analysis was conducted on recorded streamflow at Guanting Reservoir, Yanchi, and Sanjiadian to estimate the influence of precipitation variability on the drying of the Yongding River in Beijing. From 1980 to 2010, the mean annual rates of streamflow decline were 0.44 m 3 s À1 yr À1 (Guanting), 0.42 m 3 s À1 yr À1 (Yanchi), and 0.03 m 3 s À1 yr À1 (Sanjiadian). The most probable abrupt change-point for annual streamflow was 1999 at Guanting Reservoir and Yanchi, and was 2000 at Sanjiadian. Between the pre-change (1980)(1981)(1982)(1983)(1984)(1985)(1986)(1987)(1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999) and post-change (2000-2010) periods, mean annual streamflow decreased by 68.56% (Guanting), 66.92% (Yanchi), and 96.78% (Sanjiadian). A multiple regression analysis using annual precipitation and streamflow at Guanting, Yanchi, and Sanjiadian showed an insignificant relationship between local precipitation and streamflow in both periods. Next we assessed the potential impact of upstream human activities on downstream flow using: (1) correlation statistics between upstream flow and downstream flow, (2) water abstracted above Sanjiadian, and (3) upstream socioeconomic data. The results suggest upstream human activities are important drivers on downstream flow decline, which could possibly explain the weak relationship between precipitation and streamflow. Further analysis is needed to clarify the influence of upstream water consumption on Guanting Reservoir to advise management on the new freshwater ecosystems along the Yongding River.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Drivers of drying on the Yongding River in Beijing

Jiang

Wong

et al. 2014

Journal of Hydrology

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“…One of the selected approaches for such purpose is that proposed by Pettitt (1979), previously used to determine change points in streamflow and sediment discharge time series (GAO et al, 2011). This method is based on the Mann-Whitney test but the calculated statistic ( , t T U ) is given by:…”

Section: Change-point Analysismentioning

confidence: 99%

Hydrological system time lag responses to meteorological shifts

Melo

Wendland

2016

RBRH

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Hydrological system's sensibility and resilience to dry periods are crucial for estimating the potential impacts of droughts. Quantifying response times (RT) of this system's components relative to droughts allows one to develop a predictive understanding of future impacts. In this context, this study proposes the use of non-parametric statistical methods to estimate RT between meteorological shifts, given by the Standardized Precipitation Index (SPI), and the respective changes in the hydrological system, measured by river discharge (Q) and reservoir storage time series. Change point (CP) analyses were applied to time series of (i) SPI and accumulated storage relative to 32 reservoirs within the Paraná basin; and (ii) SPI, Q and reservoir storage relative to Furnas hydroelectric power plant. Based on the responses from CP analyses, RT in case (i) varied from 0 -6 months, whereas, in case (ii), results indicate that significant changes in Q occurred in the same month of changes in rainfall. Results also suggest a minor role of anthropogenic factors (dam operation) compared to natural forcing in reservoir depletion during the 2014 drought than that in 2000/2001. This study reinforces the importance of an optimized reservoir management, considering the balance between anthropogenic and natural forcing as a strategy to combat droughts impacts.Keywords: Meteorological drought; SPI; Change point analysis; Time series. RESUMOA sensibilidade de um sistema hidrológico e sua capacidade de recuperação após períodos de estiagem são questões determinantes para estimar o impacto potencial de secas. A quantificação dos tempos de resposta (TR) de componentes desse sistema em relação às secas possibilita antecipar futuros impactos. Neste contexto, o presente trabalho propõe a utilização de métodos estatísticos não-paramétricos para estimar TR entre mudanças meteorológicas, medidas por meio do índice de precipitação padronizado (SPI), e respectivas alterações no sistema hidrológico, medidas por meio de séries de vazão (Q) e de armazenamento em reservatórios. Para o desenvolvimento deste trabalho, foram estimados os pontos de mudanças das séries temporais de (i) SPI e volume de armazenamento mensal equivalente de 32 reservatórios da bacia do Rio Paraná; e de (ii) SPI, vazão e volume de armazenamento no reservatório da usina hidrelétrica de Furnas. Com base nas respostas dos métodos empregados, o TR para o caso (i) varia de 0 a 6 meses, enquanto que, para o caso (ii), os resultados indicam que mudanças significativas na vazão devido a mudanças na precipitação ocorrem em menos de 1 mês. Os resultados também mostram que os fatores antropogênicos (operação dos reservatórios) contribuíram menos para depleção dos reservatórios na seca de 2014 do que em 2000/2001. Este trabalho reforça a importância da otimização na operação de reservatórios visando o melhor equilíbrio entre fatores naturais e antropogênicos como estratégia de combate aos efeitos das secas.

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“…However, changes in a hydrological time series can occur in both a monotonic trend and in a step-change manner. The Mann-Kendall test is limited to the detection of monotonic trends (Kundzewicz and Robson 2004), while the Pettitt test (Pettitt 1979;Yang and Tian 2009;Gao et al 2011) can be used for detecting step-change in hydrological time series. For these reasons, in this study both the MannKendall and Pettitt tests were used to assess hydrological changes between 1970 and 2011 at the nine hydrological stations in the Baiyangdian river basin (Fig.…”

Section: Analysis Of Hydrological Monotonic Trends and Abrupt Changesmentioning

confidence: 99%

Impacts of land management on ecosystem service delivery in the Baiyangdian river basin

et al. 2016

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As the largest freshwater lake in northern China, Lake Baiyangdian provides a diversity of ecosystem services: it guarantees water flow to a number of beneficiaries and is an important component of sustainable regional development. However, the flows of sustainable ecosystem services from Lake Baiyangdian mainly depend on upstream hydrological and nutrient retention functions. For sustainable land management, it is important to explore the implications of upstream land-use changes by humans on the ecosystem services supplied by Lake Baiyangdian. In this study, ecological assets and hydrological time series were analysed, and the InVEST model was used to investigate the implications of land management on the delivery of ecosystem services. The results showed that significant changes in ecological assets occurred in the Baiyangdian river basin during the period 1980-2007, characterised particularly by an increase in forested area and a decline in wetland area. A significant decline in the ecological status of the Baiyangdian river basin, expressed as an abrupt change in stream flow time series 1970-2011, was also noted. Water yield and surface run-off functions were mainly influenced by precipitation, but changes in landcover patterns exacerbate the impacts of these two factors. Nutrient retention was influenced more by altered land cover than by precipitation. Due to data gaps, it was not possible to link upstream ecosystem functions to the ecosystem services contributed by Lake Baiyangdian. It will be necessary to establish a long-term ecological monitoring programme in order to gather the data needed to gain a deeper understanding of the interconnections between ecosystem function and services. The ultimate aim of such a programme must be to incorporate ecosystem services into ecosystem management and policy-making.

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Changes in streamflow and sediment discharge and the response to human activities in the middle reaches of the Yellow River

Cited by 277 publications

References 25 publications

Drivers of drying on the Yongding River in Beijing

Drivers of drying on the Yongding River in Beijing

Hydrological system time lag responses to meteorological shifts

Impacts of land management on ecosystem service delivery in the Baiyangdian river basin

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