Effects of soil bund spacing on runoff, soil loss, and soil water content in the Lake Tana Basin of Ethiopia

Demissie, Simeneh; Meshesha, Derege Tsegaye; Adgo, Enyew; Haregeweyn, Nigussie; Tsunekawa, Atsushi; Ayana, Muluken; Mulualem, Temesgen; Wubet, Anteneh

doi:10.1016/j.agwat.2022.107926

Cited by 13 publications

(5 citation statements)

References 46 publications

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“…The narrow spacing between bunds effectively accommodates surface runoff in the bund channels and increases the infiltration rate of surface runoff water. Observations for two years on a slope of 9%, with a distance between ridges of 5 m, found a reduction in runoff to 53%, 2.2 times lower than controls [61].…”

Section: Impact On Runoffmentioning

confidence: 73%

“…Improvement in the hydrological function of a watershed through SWC can be carried out on the principle of reducing slope and slope length. Constructive or vegetative measures can also increase infiltration and improve soil hydrological characteristics [61,62]. Improvement in the hydrological quality of a watershed is characterized by a decrease in the flow regime coefficient (FRC), i.e., the ratio of maximum discharge to minimum discharge; a reduction in the annual flow coefficient (AFC), i.e., the balance between runoff and rainfall amount in a year; a reduction in direct runoff; and increases in base flow and water yield [63].…”

Section: Impact On Runoffmentioning

confidence: 99%

“…It is due to the increasing infiltration in the soil medium between bunds since mounds can reduce the speed of water flow and delay runoff. To find the optimal spacing of soil bunds in each region requires exploring the effect of bund spacing on different landscape biophysical aspects, economic feasibility, and social acceptability [61].…”

Section: Impact On Runoffmentioning

confidence: 99%

“…This SWC technique also increases soil moisture from 18.6% to 25.1%. Higher soil water content can be associated with the retention of runoff in trenches, followed by absorption in the soil profile in the root zone [61]. In tropical date palm plantations, silt pits reduce surface runoff by 88.55% [78].…”

Section: Impact On Runoffmentioning

confidence: 99%

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Implementation of Soil and Water Conservation in Indonesia and Its Impacts on Biodiversity, Hydrology, Soil Erosion and Microclimate

Dharmawan¹,

Pratiwi²,

Siregar³

et al. 2023

Applied Sciences

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Soil and water are natural resources that support the life of various creatures on Earth, including humans. The main problem, so far, is that both resources can be easily damaged or degraded by human-induced drivers. The threat of damage or degradation is increasing due to rapid human population growth and humans’ insatiable daily necessities. Indonesia has had various experiences in soil and water conservation (SWC) programmes for a long time, which can be a good lesson learned for future strategy development. This article aims to provide an overview of the benefits of implementing SWC in Indonesia for biodiversity, hydrology, soil erosion, and microclimate to support sustainable ecological landscape management. Various vegetative and mechanical techniques that have been known and implemented can be utilized to improve future SWC strategies. It is expected that proper strategy development in the future for SWC in Indonesia will support the sustainability of ecological landscape management. Forthcoming SWC programmes are also expected to incorporate local knowledge into their implementation. The programmes also require coordination between stakeholders, i.e., local communities, management authorities, policymakers, and scientists, and seamless integration between varying fields and levels of governance. The main findings of this study are that SWC increased the adaptation of native plants to local rainfall and soil conditions; SWC increased infiltration and improved soil hydrological characteristics; and SWC, through vegetation techniques, played a role in lowering temperatures, increasing humidity, and reducing intensity levels.

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Section: Impact On Runoffmentioning

confidence: 73%

Section: Impact On Runoffmentioning

confidence: 99%

Section: Impact On Runoffmentioning

confidence: 99%

Section: Impact On Runoffmentioning

confidence: 99%

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Implementation of Soil and Water Conservation in Indonesia and Its Impacts on Biodiversity, Hydrology, Soil Erosion and Microclimate

Dharmawan¹,

Pratiwi²,

Siregar³

et al. 2023

Applied Sciences

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“…1), are undergoing land use and land cover changes, contributing to more than 50% of the incoming sediment load to the lake [9]. These changes involve the conversion of natural vegetation areas especially forested areas to cropland and pasture [29]. Specifically, there has been a 31% expansion of agricultural land and a 16% increase in built-up areas over the past 30 years (from 1989 to 2019) across the entire basin [30].…”

Section: Study Areamentioning

confidence: 99%

Can Turbidity Data from Remote Sensing Explain Modelled Spatial and Temporal Sediment Loading Patterns? An Application in the Lake Tana Basin

Nkwasa,

Getachew,

Lekarkar

et al. 2024

Environ Model Assess

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Understanding the spatial and temporal patterns of sediment loading in water bodies is crucial for effective water quality management. Remote sensing (RS) has emerged as a valuable and reliable tool for monitoring turbidity, which can provide insights into sediment dynamics in water bodies. In this study, we investigate the potential of turbidity data derived from RS to explain simulated spatial and temporal sediment loading patterns in the Lake Tana basin, Ethiopia. Utilizing existing RS lake turbidity data from Copernicus Global Land Service (CGLS) and simulated seasonal and multiyear trends of river sediment loadings into Lake Tana from the Soil and Water Assessment Tool (SWAT + model), we estimate correlations at different river inlets into Lake Tana. The results reveal a strong positive correlation (R2 > 0.66) between the multiyear monthly average sediment load from inflow rivers and RS lake turbidity at most river inlets. This indicates that the simulated river sediment loads and lake turbidity at river inlets exhibit similar seasonal patterns. Notably, higher turbidity levels are observed at the river inlet with the highest sediment load export. These findings highlight the potential of RS turbidity products in characterizing temporal and spatial patterns of sediment loadings, particularly in data-scarce regions, contributing to a better understanding of water quality dynamics in such areas.

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The intensity of conservation practices installed on croplands and its determinant factors in Tigray region of northern Ethiopia

Etsay,

Oniki,

Berhe

et al. 2024

Environ Dev Sustain

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Effects of soil bund spacing on runoff, soil loss, and soil water content in the Lake Tana Basin of Ethiopia

Cited by 13 publications

References 46 publications

Implementation of Soil and Water Conservation in Indonesia and Its Impacts on Biodiversity, Hydrology, Soil Erosion and Microclimate

Implementation of Soil and Water Conservation in Indonesia and Its Impacts on Biodiversity, Hydrology, Soil Erosion and Microclimate

Can Turbidity Data from Remote Sensing Explain Modelled Spatial and Temporal Sediment Loading Patterns? An Application in the Lake Tana Basin

The intensity of conservation practices installed on croplands and its determinant factors in Tigray region of northern Ethiopia

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