加纳布伊盆地的水电大坝建设和水资源供应

IF 5 2区 地球科学 Q1 WATER RESOURCES
Samuel Nana Safo Kantanka , Michael Addaney , Prosper Kpiebaya , Jonas Ayaribilla Akudugu , Benjamin Wullobayi Dekongmen
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引用次数: 0

摘要

本研究利用遥感、GIS、InVEST水量模型和IHA分析,对建在加纳黑沃尔特河上的400兆瓦水电站布伊大坝的水文影响进行了评估。InVEST模型估计,年产水量将逐步增加,从3.25 MCM(2000年)增加到4.75 MCM(2020年),在研究期间净增加1.50 MCM。这一趋势与土地利用变化相关,包括森林减少(81.4 - 35.8% %覆盖率)和城市扩张(24,713.48 ha至95,207 ha)。IHA的分析揭示了严重的水文变化,包括旱季流量延长了92天,雨季峰值提前了10天,破坏了生态和生计系统。模型验证表明,观测到的产量与模拟的产量非常吻合(NSE > 0.8, R²> 0.85)。研究结果强调了水力发电和河流生态系统完整性之间的权衡,强调了适应性水坝管理以维持水资源供应的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hydro-power dam construction and water availability in the Bui Basin of Ghana

Study region

Bui River Basin, Bono Region, Ghana

Study focus

This study evaluates the hydrological impacts of the 400 megawatt hydroelectric Bui Dam built on Ghana’s Black Volta River using remote sensing, GIS, the InVEST water yield model, and IHA analysis. The InVEST model estimated a progressive increase in annual water yield, from 3.25 MCM (2000) to 4.75 MCM (2020), with a net rise of 1.50 MCM over the study period. This trend correlated with land-use changes, including forest decline (81.4–35.8 % coverage) and urban expansion (24,713.48 ha to 95,207 ha).

New hydrologic insights

The IHA analysis revealed severe hydrological alterations, including a 92-day extension of dry-season flows and earlier wet-season peaks by 10 days, disrupting ecological and livelihood systems. Model validation showed strong agreement between observed and simulated yields (NSE > 0.8, R² > 0.85). The findings highlight trade-offs between hydropower generation and riverine ecosystem integrity, emphasizing the need for adaptive dam management to sustain water availability.
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来源期刊
Journal of Hydrology-Regional Studies
Journal of Hydrology-Regional Studies Earth and Planetary Sciences-Earth and Planetary Sciences (miscellaneous)
CiteScore
6.70
自引率
8.50%
发文量
284
审稿时长
60 days
期刊介绍: Journal of Hydrology: Regional Studies publishes original research papers enhancing the science of hydrology and aiming at region-specific problems, past and future conditions, analysis, review and solutions. The journal particularly welcomes research papers that deliver new insights into region-specific hydrological processes and responses to changing conditions, as well as contributions that incorporate interdisciplinarity and translational science.
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