Effects of rainfall variations on river channel transmission losses in a semi‐arid catchment. Issue 1 (26th July 2020)
- Record Type:
- Journal Article
- Title:
- Effects of rainfall variations on river channel transmission losses in a semi‐arid catchment. Issue 1 (26th July 2020)
- Main Title:
- Effects of rainfall variations on river channel transmission losses in a semi‐arid catchment
- Authors:
- Mujere, Never
Mazvimavi, Dominic
Masocha, Mhosisi
Makurira, Hodson - Abstract:
- Abstract: Flows along river reaches decrease in the downstream direction as a result of transmission losses. These losses are important in arid and semi‐arid regions where there is critical water scarcity. Poor quantification of losses compromises the quality of information useful for effective water resources management. This study determined the influence of rainfall variations on transmission loss trends along Runde River in Zimbabwe. Monthly rainfall and flow data from 2010 to 2014 were used in the analysis. Losses were estimated as the difference between reach inflow at an upstream station (E133) and outflow at the downstream station (E83). The Mann–Kendall trend test was applied to detect trends in losses and rainfall data during dry seasons (April–September) and wet seasons (October–March). Results show no significant increasing rainfall and transmission loss trends ( S = 2, p > .1) during wet seasons. During dry seasons, rainfall show no significant decreasing trends ( S = 4, p > .1) whereas losses show no trends ( S = 0). Results also show no significant ( p > .05) relationship between rainfall and losses during wet and dry seasons. This simple and quick approach can be applied in similar systems to understand the variations in transmission losses and address otherwise water resource challenges. 摘要:Abstract: Flows along river reaches decrease in the downstream direction as a result of transmission losses. These losses are important in arid and semi‐arid regions where there is critical water scarcity. Poor quantification of losses compromises the quality of information useful for effective water resources management. This study determined the influence of rainfall variations on transmission loss trends along Runde River in Zimbabwe. Monthly rainfall and flow data from 2010 to 2014 were used in the analysis. Losses were estimated as the difference between reach inflow at an upstream station (E133) and outflow at the downstream station (E83). The Mann–Kendall trend test was applied to detect trends in losses and rainfall data during dry seasons (April–September) and wet seasons (October–March). Results show no significant increasing rainfall and transmission loss trends ( S = 2, p > .1) during wet seasons. During dry seasons, rainfall show no significant decreasing trends ( S = 4, p > .1) whereas losses show no trends ( S = 0). Results also show no significant ( p > .05) relationship between rainfall and losses during wet and dry seasons. This simple and quick approach can be applied in similar systems to understand the variations in transmission losses and address otherwise water resource challenges. 摘要: 河段由于传输损失会造成下游处流出量减少。这些损失对那些严重缺水的干旱地区及半干旱地区而言尤为重要。对损失的量化不善会降低对有效水资源管理而言有用的信息质量。本研究确定了降水量变化对津巴布韦伦迪河传输损失趋势产生的影响。分析使用了2010年至2014年间每月的降水和水流数据。用从上游站(E133)河段入口与下游站(E83)河段出口之间的流量差距来估测传输损失。 Mann–Kendall (MK) 趋势检验被用于探测旱季(四月至九月)与雨季(十月至三月)期间传输损失与降水数据的趋势。结果显示,雨季期间降水与传输损失未出现显著上涨趋势( S = 2, p > 0.1 )。旱季期间降水未出现显著下降趋势( S = 4, p > 0.1 ),而传输损失无趋势( S = 0 )。结果还表明,雨季和旱季期间降水与传输损失之间未出现显著关系( p > 0.05 )。该简易快捷方法能被应用于相似系统,以理解传输损失变化,并应对不同水资源挑战。 Resumen: El río alcanza la descarga de experiencia disminuyendo aguas abajo debido a las pérdidas de transmisión. Estas pérdidas son importantes en regiones áridas y semiáridas donde hay escasez crítica de agua. La escasa cuantificación de las pérdidas compromete la calidad de la información útil para la gestión eficaz de los recursos hídricos. Este estudio determinó la influencia de las variaciones de lluvia en las tendencias de pérdida de transmisión a lo largo del río Runde en Zimbabwe. En el análisis se utilizaron datos mensuales de precipitación y flujo de 2010 a 2014. Las pérdidas se estimaron como la diferencia entre la entrada de alcance en una estación aguas arriba (E133) y la salida en la estación aguas abajo (E83). La prueba de tendencia de Mann–Kendall (MK) se aplicó para detectar tendencias en pérdidas y datos de lluvia durante las estaciones secas (abril a septiembre) y las estaciones húmedas (octubre a marzo). Los resultados no muestran un aumento significativo de las tendencias de lluvia y pérdida de transmisión (S = 2, p> 0.1) durante las estaciones húmedas. Durante las estaciones secas, la lluvia no muestra tendencias decrecientes significativas (S = 4, p> 0.1) mientras que las pérdidas no muestran tendencias (S = 0). Los resultados tampoco muestran una relación significativa (p> 0.05) entre la lluvia y las pérdidas durante las estaciones húmedas y secas. Este enfoque simple y rápido se puede aplicar en sistemas similares para comprender las variaciones de las pérdidas de transmisión y abordar los desafíos de los recursos hídricos. … (more)
- Is Part Of:
- World water policy. Volume 6:Issue 1(2020)
- Journal:
- World water policy
- Issue:
- Volume 6:Issue 1(2020)
- Issue Display:
- Volume 6, Issue 1 (2020)
- Year:
- 2020
- Volume:
- 6
- Issue:
- 1
- Issue Sort Value:
- 2020-0006-0001-0000
- Page Start:
- 134
- Page End:
- 141
- Publication Date:
- 2020-07-26
- Subjects:
- Mann‐Kendall test -- Runde River -- statistical significance -- transmission losses -- trends
统计显著性 -- 趋势 -- 传输损失 -- Mann‐Kendall 检验 -- 伦迪河
significación estadística -- tendencias -- pérdidas de transmisión -- prueba de Mann‐Kendall -- río Runde
Water resources development -- Government policy -- Periodicals
Water-supply -- Government policy -- Periodicals
Water-supply -- Management -- Periodicals
Environmental policy -- Periodicals
363.61 - Journal URLs:
- https://onlinelibrary.wiley.com/journal/2639541x ↗
http://onlinelibrary.wiley.com/ ↗ - DOI:
- 10.1002/wwp2.12028 ↗
- Languages:
- English
- ISSNs:
- 2639-541X
- Deposit Type:
- Legaldeposit
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- Available online (eLD content is only available in our Reading Rooms) ↗
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- British Library DSC - BLDSS-3PM
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