Spatial and temporal variations of precipitation in Haihe River Basin, China: six decades of measurements

Wang, Zhonggen; Luo, Yuzhou; Liu, Changming; Xia, Jun; Zhang, Minghua

doi:10.1002/hyp.8055

Cited by 34 publications

(29 citation statements)

References 15 publications

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“…The existence of a statistical significant breakpoint indicates that the study period should be segmented into sub‐periods for trend analyses and other investigations. This approach was widely used for similar studies on hydrology and climatic change in many regions [e.g., Partal and Kahya , 2006; Smadi and Zghoul , 2006; Wang et al , 2009; Zheng et al , 2009; Wang et al , 2011]. The existence and significance of a breakpoint may vary with the study locations and periods.…”

Section: Methodsmentioning

confidence: 99%

Dramatic decrease in streamflow from the headwater source in the central route of China's water diversion project: Climatic variation or human influence?

Liu¹,

Liu²,

Luo³

et al. 2012

J. Geophys. Res.

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.[1] The Danjiangkou Reservoir is the headwater source of the central route of China's South to North Water Diversion Project (SNWDP). Average annual streamflow into the Reservoir was 40.97 km 3 from 1951 to 1989, while it was 31.64 km 3 from 1990 to 2006. Between the two periods, the average annual streamflow was reduced by 9.33 km 3 , accounting for 71.8% of the proposed amount of water diversion of the central route (13 km 3 per year). The sharply decreasing streamflow would inevitably have negative impacts on the implementation of the SNWDP. The reasons for the decrease in streamflow should be investigated before developing any adaption strategies. In this study, the impacts of climatic variation and human activities on streamflow were evaluated by a climate elasticity method. The results show that the impact of climatic variation (indicated by precipitation and potential evapotranspiration) was responsible for 84.1-90.1% of the streamflow reduction, while human activities or other indentified uncertainties contributed 9.9-15.9% of the streamflow reduction. The observed 69.89 mm decrease in average annual precipitation contributed 81.6-87.3% of the decrease in streamflow. According to the observed data during the study period, the planned water diversion could lead to an ecological disaster of the downstream area of the Danjiangkou Reservoir in certain years. We suggest that the water diversion from the Danjiangkou Reservoir should be conducted in an adaptive manner to avoid such an adverse consequence, instead of the current plan of a fixed annual amount of water.Citation: Liu, X., C. Liu, Y. Luo, M. Zhang, and J. Xia (2012), Dramatic decrease in streamflow from the headwater source in the central route of China's water diversion project: Climatic variation or human influence?,

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Section: Methodsmentioning

confidence: 99%

Dramatic decrease in streamflow from the headwater source in the central route of China's water diversion project: Climatic variation or human influence?

Liu¹,

Liu²,

Luo³

et al. 2012

J. Geophys. Res.

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“…The precipitation influenced by the East Asia monsoon decreases from southeast to northwest, and approximately 70-80% of precipitation occurs during the monsoon season from June to September (Chen, 1999). Snow contributes the majority of the precipitation in winter, but generally melts in 2-3 weeks (Wang et al, 2011b). The mean annual pan evaporation ranges from 1100 to 2000 mm (Chen et al, 2005), which is measured by the diameter 20 cm of the evaporation pan.…”

Section: Study Areamentioning

confidence: 99%

Evaluating actual evapotranspiration and impacts of groundwater storage change in the North China Plain

Cao

Han

Song

2013

Hydrological Processes

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As a critical water discharge term in basin‐scale water balance, accurate estimation of evapotranspiration (ET) is therefore important for sustainable water resources management. The understanding of the relationship between ET and groundwater storage change can improve our knowledge on the hydrological cycle in such regions with intensive agricultural land usage. Since the 1960s, the North China Plain (NCP) has experienced groundwater depletion because of overexploitation of groundwater for agriculture and urban development. Using meteorological data from 23 stations, the complementary relationship areal evapotranspiration model is evaluated against estimates of ET derived from regional water balance in the NCP during the period 1993–2008. The discrepancies between calculated ET and that derived by basin water balance indicate seasonal and interannual variations in model parameters. The monthly actual ET variations during the period from 1960 to 2008 are investigated by the calibrated model and then are used to derive groundwater storage change. The estimated actual ET is positively correlated with precipitation, and the general higher ET than precipitation indicates the contributions of groundwater irrigation to the total water supply. The long term decreasing trend in the actual ET can be explained by declining in precipitation, sunshine duration and wind speed. Over the past ~50 years, the calculated average annual water storage change, represented by the difference between actual ET and precipitation, was approximately 36 mm, or 4.8 km3; and the cumulative groundwater storage depletion was approximately 1700 mm, or 220 km3 in the NCP. The significantly groundwater storage depletion conversely affects the seasonal and interannual variations of ET. Irrigation especially during spring cause a marked increase in seasonal ET, whereas the rapid increasing of agricultural coverage over the NCP reduces the annual ET and is the primary control factor of the strong linear relationship between actual and potential ET. Copyright © 2013 John Wiley & Sons, Ltd.

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“…Trenberth et al [16] found that there were increases in temperatures and sea surface temperatures along the western coast of North America and Alaska, as well as changes in coastal rainfall and streamflow. In China, Wang et al [17] found an abrupt decrease in the flood-season precipitation around the year of 1979 based on weather stations in the Haihe River Basin. Zhao et al [18] confirmed an abrupt decrease in precipitation during the late 1970s and middle 1980s was also observed in the upper Yellow River Basin.…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Variations of Precipitation Extremes and Seasonality over China from 1961~2013

Tao

Wang

Song

et al. 2018

Water

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Using the 0.5 • × 0.5 • gridded Chinese ground precipitation dataset from 1961-2013, spatial and temporal variations in precipitation extremes, total precipitation, the seasonality of precipitation and their linkages in the context of climate change are investigated using the Mann-Kendall trend test, Pettitt change-point test and correlation analysis. The investigation focuses on four extreme indices, i.e., the annual maximum number of consecutive dry days (CDD), the annual maximum number of consecutive wet days (CWD), the annual total precipitation when daily precipitation is greater than 95th percentile (R95pTOT), and the maximum 1-day precipitation (RX1day). The results show that precipitation extremes increased in northwestern China, especially Xinjiang, Tibet and Qinghai (CWD, R95pTOT and RX1day), and scattered parts of southeastern China (R95pTOT and RX1day), but decreased over considerable parts of southwestern China (CWD) and some small parts of northern China (CWD, R95pTOT and RX1day); the spatial patterns of the trends in precipitation extremes and that of total precipitation exhibit considerable similarity over China, which indicates the close relationship between changes in precipitation extremes and total precipitation; change points are detected in different periods ranging from early 1970s to early 2000s for different regions and extreme precipitation indices, and the spatial patterns of the abrupt changes of extreme indices are similar to those of the trends in extreme indices; the concentration index (CI) is strongly positively correlated with R95pTOT and RX1day in most areas in northern China (from the northeast to the northwest) and southwestern China (including Sichuan, Chongqing Guizhou and Guangxi), which means for these regions, the temporal heterogeneity of daily precipitation over a year is dominated by heavy rainfall amounts. The seasonality index of precipitation (SI) is positively related to R95pTOT and RX1day over most areas above 30 • N, indicating that heavy precipitation events have a better chance to occur in places with a strong seasonal variation in annual precipitation in these areas, but for most areas below 30 • N, the positive relationship is not significant.

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Spatial and temporal variations of precipitation in Haihe River Basin, China: six decades of measurements

Cited by 34 publications

References 15 publications

Dramatic decrease in streamflow from the headwater source in the central route of China's water diversion project: Climatic variation or human influence?

Dramatic decrease in streamflow from the headwater source in the central route of China's water diversion project: Climatic variation or human influence?

Evaluating actual evapotranspiration and impacts of groundwater storage change in the North China Plain

Spatial and Temporal Variations of Precipitation Extremes and Seasonality over China from 1961~2013

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