Climatic and anthropogenic impacts on water and sediment generation in the middle reach of the Jinsha River Basin

Zhang, Pingping; Cai, Yanpeng; Yang, Wei; Yi, Yujun; Zhang, Yang

doi:10.1002/rra.3572

Cited by 8 publications

(4 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[5,6], with precipitation being the crucial driving factor [7]. In addition, with rapid economic development, human activities are altering the ecological environment of a basin in the form of greenhouse gas emissions, land-use changes, water conservancy construction, and human water consumption, resulting in an increasingly significant effect on river runoff [8,9]. Therefore, evaluating the influence of climate change and human activities on river runoff is meaningful for rational water resources management, protecting ecological balance, and maintaining sustainable socio-economic development [10].…”

Section: Introductionmentioning

confidence: 99%

Inverse Trend in Runoff in the Source Regions of the Yangtze and Yellow Rivers under Changing Environments

Bao

Wang

et al. 2022

Water

View full text Add to dashboard Cite

The source regions of the Yangtze River (SRYZ) and the Yellow River (SRYR) are sensitive areas of global climate change. Hence, determining the variation characteristics of the runoff and the main influencing factors in this region would be of great significance. In this study, different methods were used to quantify the contributions of climate change and other environmental factors to the runoff variation in the two regions, and the similarities and differences in the driving mechanisms of runoff change in the two regions were explored further. First, the change characteristics of precipitation, potential evapotranspiration, and runoff were analyzed through the observational data of the basin. Then, considering the non-linearity and non-stationarity of the runoff series, a heuristic segmentation algorithm method was used to divide the entire study period into natural and impacted periods. Finally, the effects of climate change and other environmental factors on runoff variation in two regions were evaluated comprehensively using three methods, including the improved double mass curve (IDMC), the slope change ratio of cumulative quantity (SCRCQ), and the Budyko-based elasticity (BBE). Results indicated that the annual precipitation and potential evapotranspiration increased during the study period in the two regions. However, the runoff increased in the SRYZ and decreased in the SRYR. The intra-annual distribution of the runoff in the SRYZ was unimodal during the natural period and bimodal in the SRYR. The mutation test indicated that the change points of annual runoff series in the SRYZ and SRYR occurred in 2004 and 1989, respectively. The attribution analysis methods yielded similar results that climate change had the greatest effect on the runoff variation in the SRYZ, with a contribution of 59.6%~104.6%, and precipitation contributed 65.3%~109.6% of the increase in runoff. In contrast, the runoff variation in the SRYR was mainly controlled by other environmental factors such as permafrost degradation, land desertification, and human water consumption, which contributed 83.7%~96.5% of the decrease in the runoff. The results are meaningful for improving the efficiency of water resources utilization in the SRYZ and SRYR.

show abstract

Section: Introductionmentioning

confidence: 99%

Inverse Trend in Runoff in the Source Regions of the Yangtze and Yellow Rivers under Changing Environments

Bao

Wang

et al. 2022

Water

View full text Add to dashboard Cite

show abstract

“…Trends within climatic variable time series have received considerable attention in recent decades [10] and have been investigated using different methodologies, including parametric and/or nonparametric procedures, such as the Mann-Kendall (MK) test [11][12][13], linear regression method [6,14], while the increasing trend during spring was more significant than those during the other seasons. Various other studies [38][39][40] have also applied the MK approach to investigate trends in climatic variables such as temperature and precipitation in the JRB. However, a limited number of studies have focused on spatial and temporal variations in different categories of temperature and precipitation, especially for the low and high categories.…”

Section: Introductionmentioning

confidence: 99%

Innovative Trend Analysis of Air Temperature and Precipitation in the Jinsha River Basin, China

Dong

Jia

Sarukkalige

et al. 2020

Water

View full text Add to dashboard Cite

Trend detection based on hydroclimatological time series is crucial for understanding climate change. In this study, the innovative trend analysis (ITA) method was applied to investigate trends in air temperature and precipitation over the Jinsha River Basin (JRB), China, from 1961 to 2016 based on 40 meteorological stations. Climatic factors series were divided into three categories according to percentile, and the hidden trends were evaluated separately. The ITA results show that annual and seasonal temperatures have significantly increased whereas the variation range of annual temperature tended to narrow. Spatial pattern analysis of the temperature indicates that high elevation areas show more increasing trends than flat areas. Furthermore, according to ITA, significant increase trends are observed in annual precipitation and “high” category of spring precipitation. The sub-basins results show a significant decreasing trend in elevation zones of ≤2000 m and an increasing trend where elevation is >2000 m. Moreover, linkage between temperature and precipitation was analyzed and the potential impact of the combined changes was demonstrated. The results of this study provide a reference for future water resources planning in the JRB and will help advance the understanding of climate change in similar areas.

show abstract

“…In comparison, Santucci et al (2005) found little evidence of the cumulative effects of low-head dams (< 15 m in height). There are few existing studies that compare the effects of single versus multiple dams on the hydrologic regime (Zhao et al, 2012). Are the effects of multiple dams additive, multiplicative or largely insignificant?…”

Section: Introductionmentioning

confidence: 99%

Development of a revised method for indicators of hydrologic alteration for analyzing the cumulative impacts of cascading reservoirs on flow regime

Zhou

Huang

Zhao

et al. 2020

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. The impacts of reservoirs, especially multiple reservoirs, on the flow regimes and ecosystems of rivers have received increasing attention. The most widely used metrics to quantify the characteristics of flow regime alterations are the indicators of hydrologic alteration (IHAs) which include 33 parameters. Due to the difference in the degree of alteration and the intercorrelation among IHA parameters, the conventional method of evaluating IHA parameters that assigns the same weight to each indicator is obviously inadequate. A revised IHA method is proposed by utilizing the projection pursuit (PP) and real-coded accelerated genetic algorithm (RAGA). Data reliability is analyzed by using the length of record (LOR) method. The projection values reflecting the comprehensive characteristics of the evaluation parameters are calculated. Based on these methods, a scientific and reliable evaluation of the cumulative impacts of cascading reservoirs on the flow regime was made by examining the Jinsha River. The results showed that with the increase in the number of reservoirs, the alteration degrees of IHA parameters gradually increased in groups 1, 2, 3 and 4 but decreased in group 5 (each group addresses the magnitude, timing, frequency, duration and rate of change in turn), and the flow duration curves showed a declining trend at the high-flow part and an increasing trend at the low-flow part. The flow regime alteration of the outlet section was more stable than before. This change had a negative impact on downstream fish reproduction and ecological protection. An attempt at ecological regulation was made to simulate the natural rising process of water, and four major Chinese carps have a positive response to the flood peak process caused by manual regulation.

show abstract

Climatic and anthropogenic impacts on water and sediment generation in the middle reach of the Jinsha River Basin

Cited by 8 publications

References 42 publications

Inverse Trend in Runoff in the Source Regions of the Yangtze and Yellow Rivers under Changing Environments

Inverse Trend in Runoff in the Source Regions of the Yangtze and Yellow Rivers under Changing Environments

Innovative Trend Analysis of Air Temperature and Precipitation in the Jinsha River Basin, China

Development of a revised method for indicators of hydrologic alteration for analyzing the cumulative impacts of cascading reservoirs on flow regime

Contact Info

Product

Resources

About