Identification of Attribution of Runoff Variations in the Tumen River Basin Based on Budyko’s Hypothesis

Hydrology, Journal Year: 2025, Volume and Issue: 12(5), P. 122 - 122

Published: May 18, 2025

The Tumen River Basin (TRB), a critical China border region, has experienced complex evolution of runoff due to climate change and human activities. This study aims quantify the main drivers variations in TRB based on Budyko framework assess relative contributions activities fluctuations. Results indicate pronounced warming increased precipitation TRB, while exhibits declining trend with temporal variability. Runoff decreased during 1956–1980 but post 1980. Overall, is dominant factor driving fluctuations TRB. A comparison across different sub-basins shows that contribution higher middle upper reaches River, reaching up 93.8%. In lower basin, contribute significantly variations. Higher forest cover reservoir construction help maintain long-term stability watershed runoff. provides scientific basis data support for water resources development ecological protection basin.

Language: Английский

Increasing flood risk under climate change and social development in the Second Songhua River basin in Northeast China

Journal of Hydrology Regional Studies, Journal Year: 2023, Volume and Issue: 48, P. 101459 - 101459

Published: June 26, 2023

Second Songhua River basin (SSRB), Northeast China. Accurately assessing future flood risks is the premise and foundation of control water resources management. At present, studies are still lacking in watershed that consider climate change social development China relative risk assessment framework. This study proposed an integrated framework containing AHP, entropy weight, GCM downscaling methods, which was implemented SSRB, a typical China, to estimate under development. The SSRB will increase significantly mid-term (2051–2075) long-term (2076–2100) future. areas four scenarios with greater than high-risk levels expand by 28.9 %, 105.6 165.6 156.7 respectively, compared historical scenario. newly added mainly located lower reaches. Precipitation changes primary reason for risks. increased GDP higher forcing degree also Based on these above findings, extreme precipitation forecasting management downstream need be enhanced. Energy-saving emission-reduction measures should simultaneously implemented.

Language: Английский

Long-Term Trends and Variability of Hydroclimate Variables and Their Linkages with Climate Indices in the Songhua River

Atmosphere, Journal Year: 2024, Volume and Issue: 15(2), P. 174 - 174

Published: Jan. 30, 2024

The long-term trends and variability of hydroclimate variables are critical for water resource management, as well adaptation to climate change. Three popular methods were used in this study explore the during last 122 years Songhua River (SHR), one most important river systems China. Results show followings: (1) There was an obvious pattern decadal oscillations, with three positive negative precipitation streamflow anomalies. lengths these phases vary from 11 36 years. (2) Annual temperature demonstrated a statistically significant increasing trend years, magnitude 0.30 °C/10 50–60 being larger than that global surface temperature. It has increased much faster since 1970. (3) Monthly winter season recent almost same earlier periods, but significantly monthly observed due snowmelt under warming climate. (4) A correlation between indices can be determined. These results could make better management decisions SHR, especially future change scenarios.

Language: Английский