Quantitative evaluation of runoff variation and its driving forces based on multi-scale separation framework

Guo, Wei; Hong, Fengtian; Yang, Huan; Huang, Lintong; Ma, Yinchu; Zhou, Haotong; Wang, Hongxiang

doi:10.1016/j.ejrh.2022.101183

Cited by 8 publications

(1 citation statement)

References 54 publications

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“…The probable evaporation Y t is the maximum amount of water that can leave the watershed in the form of evaporation, while the effective water W t is the sum of the probable evaporation and the outflow from the soil aquifer. The possible evaporation Yt is expressed as (Guo et al, 2022):…”

Section: Abcd Hydrological Modelmentioning

confidence: 99%

Attribution analysis of multi-temporal scale changes of streamflow in the source area of Lancang River with seasonal scale Budyko model

Liu,

Chen,

Zhang

et al. 2023

Front. Ecol. Evol.

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Under the influence of climate change and human activities, the intra-annual distribution characteristics of streamflow have changed, directly affecting the exploitation of water resources and the health of ecosystems. The trend-free pre-whitening Mann-Kendall (TFPW-MK) test method, concentration degree and concentration period, and Bernaola-Galvan (BG) segmentation algorithm were applied to analyze variation trend, intra-annual distribution characteristics, and abrupt year of streamflow. Then, the monthly water storage and monthly actual evaporation of the source area of the Lancang River (SALR) were calculated by the monthly ABCD model. Finally, the contributions of different factors to runoff variability at multiple time scales were quantified using the seasonal-scale Budyko hypothesis approach. The results showed that: (1) The runoff revealed a significant upward trend on the annual scale. Runoff exhibited a significant upward trend in January, October and November, and runoff in other months and seasons exhibited an insignificant upward trend. (2) The intra-annual distribution characteristics of runoff in the SALR showed an obvious “Single-peak type“ distribution, reaching a maximum in July and August. (3) The year of sudden change in streamflow was 2008. (4) The contribution of climate change and human activities to the annual runoff change was 83.3% and 16.7%, respectively. The degree of influence of climate change on runoff change was ranked as spring (96.8%), autumn (85.3%), winter (82.2%) and summer (58.2%). The order of impact of human activity on runoff change was summer (41.8%), winter (17.8%), autumn (14.7%), spring (3.2%).

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Section: Abcd Hydrological Modelmentioning

confidence: 99%

Attribution analysis of multi-temporal scale changes of streamflow in the source area of Lancang River with seasonal scale Budyko model

Liu,

Chen,

Zhang

et al. 2023

Front. Ecol. Evol.

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Quantifying the impacts of climate change and human activities on ecological flow security based on a new framework

Wang,

Cheng,

Bai

et al. 2024

Ecohydrology

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Climate change and human activities combine to alter river hydrology, thereby threatening the health of river ecosystems. Quantifying the impacts of climate change and human activities on ecological flow assurance is essential for water resource management and river ecological protection. However, fewer studies quantify the impacts of climate change and human activities on ecological flow assurance based on a complete set of frameworks. The present study introduces an integrated assessment framework designed to quantify the impacts of climate change and human activities on ecological flow security. The framework includes the following steps: (1) natural river runoff reconstruction utilizing a semi‐distributed hydrological model (SWAT), (2) calculation of the most suitable ecological stream flow of the watershed ecosystem by using the non‐parametric kernel density estimation method, (3) calculation of the safety and security levels under minimum ecological flow and appropriate ecological flow conditions in the watershed and (4) quantification of the influences of climate change and human activities on the security of ecological flow in the watershed through the application of a quantitative attribution method. The impact of climate change and human activities on the ecological flow assurance level was analysed using three hydrological stations in Xiangtan, Hengyang and Laobutou, which are the main tributaries of the Xiangjiang River Basin, as a case study. The findings indicated a substantial decrease in ecological flow assurance levels across the basin during the period of human impact (1991–2019). The quantitative assessment results suggest that human activities predominantly drive the degradation of ecological flow assurance throughout the period of human impact, accounting for 57.05% of the total impact. Extensive gradient reservoir scheduling and anthropogenic water withdrawals were the main factors contributing to the degradation of ecological flow assurance in the study basin. The methodology and findings presented in this study offer insights into the evolutionary characteristics and driving forces behind ecological flow security in a dynamic environment. Furthermore, they establish a scientific foundation for local water resource management and river ecosystem protection.

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Evolution and attribution of ecological flow in the Xiangjiang River basin since 1961

Guo,

Hong,

Wang

et al. 2023

Environ Sci Pollut Res

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Quantitative evaluation of runoff variation and its driving forces based on multi-scale separation framework

Cited by 8 publications

References 54 publications

Attribution analysis of multi-temporal scale changes of streamflow in the source area of Lancang River with seasonal scale Budyko model

Attribution analysis of multi-temporal scale changes of streamflow in the source area of Lancang River with seasonal scale Budyko model

Quantifying the impacts of climate change and human activities on ecological flow security based on a new framework

Evolution and attribution of ecological flow in the Xiangjiang River basin since 1961

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