Integrating Sediment (dis)Connectivity into a Sediment Yield Model for Semi-Arid Catchments DOI Creative Commons

Louise Lodenkemper,

Kate Rowntree, Denis Hughes

et al.

Land, Journal Year: 2021, Volume and Issue: 10(11), P. 1204 - 1204

Published: Nov. 7, 2021

Soil erosion-associated sedimentation has become a significant global threat to sustainable land and water resources management. Semi-arid regions that characterise much of southern Africa are particularly at risk due extreme hydrological regimes sparse vegetative cover. This study aims address the need for an erosion sediment delivery model successfully incorporates our conceptual understanding processes in semi-arid regions, storage connectivity within catchment. Priorities Sediment Yield Model (SASYM) were simplicity practical applicability resource management while adhering basic geomorphic principles. SASYM was able represent multiple storages catchment effectively change landscape over timeframes. used Pitman rainfall–runoff disaggregated daily timescale, Modified Universal Loss Equation (MUSLE), incorporating probability function theory representation connectors across semi-distributed applied Karoo, South Africa. Although there limited observed data, historical dataset available through dam history. present this history provide evidence change.

Language: Английский

Soil Erosion Assessment Using the RUSLE Model, Remote Sensing, and GIS in the Shatt Al-Arab Basin (Iraq-Iran) DOI Creative Commons
Hadi Allafta, Christian Opp

Applied Sciences, Journal Year: 2022, Volume and Issue: 12(15), P. 7776 - 7776

Published: Aug. 2, 2022

In the Shatt Al-Arab basin, soil erosion is a major problem due to steepness of terrain and significant difference in altitude between upstream downstream parts basin. Vast quantities are moved annually, resulting massive repercussions including degradation, structural damage, biodiversity loss, productivity reduction catchment area, huge sediment load, pollution streams rivers. Consequently, assessment risk geographical distribution essential for constructing database developing effective control strategies. Revised Universal Soil Loss Equation (RUSLE) was combined with Remote Sensing (RS) Geographic Information System (GIS) current work define hazard map The RUSLE model included various characteristics zonation rainfall erosivity, erodibility, slope length steepness, land cover management, conservation support practices. Annual rates this study tons per hectare were: extremely high (more than 50); very (50 16.5); (16.5 2.2); medium (2.2 1); low (1 0) ton ha−1year−1 representing 16, 4, 13, 7, 60 % basin’s respectively. loss associated heavy rainfall, loamy predominance, elevated terrains/plateau borders steep side slope, intensive farming. Managers policymakers may use results implement adequate programs prevent or recommend acts if development projects proceed places risk.

Language: Английский

Citations

41
Soil Erosion Assessment Using the RUSLE Model and Geospatial Techniques (Remote Sensing and GIS) in South-Central Niger (Maradi Region) DOI Open Access
Mohamed Adou Sidi Almouctar, Yiping Wu, Fubo Zhao

et al.

Water, Journal Year: 2021, Volume and Issue: 13(24), P. 3511 - 3511

Published: Dec. 9, 2021

A systematic method, incorporating the revised universal soil loss equation model (RUSLE), remote sensing, and geographic information system (GIS), was used to estimate erosion potential area in Maradi region of south-central Niger. The spatial trend seasonal obtained by integrating sensing environmental variables into a grid-based GIS method. RUSLE is most commonly method for estimating erosion, its input variables, such as rainfall erosivity, erodibility, slope length steepness, cover management, conservation practices, vary greatly over space. These factors were calculated determine their influence on average region. An estimated mean annual 472.4 t/ac/year, based RUSLE, determined study area. rates varied from 14.8 944.9 t/ac/year. eroded areas identified central west-southern areas, with ranging 237.1 maps can serve useful reference deriving land planning management strategies provide opportunity develop decision plan prevention control

Language: Английский

Citations

37
Reservoir sedimentation and its effect on storage capacity – A case study of Murera reservoir, Kenya DOI Creative Commons
Parfait Iradukunda, Erion Bwambale

Cogent Engineering, Journal Year: 2021, Volume and Issue: 8(1)

Published: Jan. 1, 2021

Lakes and dams located in sediment-laden rivers infill with time which reduces the storage capacity consequently quality of aquatic life. Anthropogenic activities Kenya's Murera watershed have had significant impacts on water reservoir inturn affects ecosystems. This study focused sedimentation assessment examination sediment loss dam. was achieved by establishing engineering concepts using Bathymetric Survey System (BSS) comprising navigation twin boat system (Dual Jon-boats) an in-built Global Positioning (GPS) for collecting spatial data. A multi-frequency acoustic frequencies 200,50 12 kHz used to determine bed level, part layers, deposited sediments, respectively, pre-impoundment levels reservoir. Data processing analysis were performed Depthpic 5.0.2 Surfer 15.5, ArcGIS 10.3 software. The results show that depth increased from North South a maximum 7.78 m 707,862.03 m3. Sediment deposition is concentrated southern compared north layer thickness varied 0 up 0.8 (maximum) total 117,683.39 m3, this implies lost 14% its actual capacity. Results provide pertinent information policymakers Kenya regarding development, prioritization mitigation remediation strategies address problems resources.

Language: Английский

Citations

34
SEDIMENTATION ANALYSIS ON SEYHAN DAM RESERVOIR USING LONG TERM BATHYMETRY DATA DOI Open Access
Mehmet Ali Akgül, Şerife Pınar GÜVEL, Hakan Aksu

et al.

Mühendislik Bilimleri ve Tasarım Dergisi, Journal Year: 2024, Volume and Issue: 12(1), P. 16 - 33

Published: March 25, 2024

In this study, sedimentation in the Seyhan Dam reservoir was investigated by analyzing a long-term bathymetric survey dataset. The focus on understanding how capacity changes impact operation rules. findings revealed that from main branch of River has largely stopped since construction Çatalan Dam, but Çakıt continues. Furthermore, study observed upper basin between 1990 and 2018 based CORINE Land Cover (CLC) forest area increased 23.71% to 24.36%, water bodies expanded 0.3% 0.9%. This increase contributed reduction sediment flow into reservoir. researchers used regression analysis found high correlation (R2=0.96) storage time (in years) at 67.5-meter level Reservoir. Overall, study's results suggest decrease entering significantly improved issue.

Language: Английский

Citations

4
Investigation of Flood Management and Mitigation Measures in Ungauged NATURA Protected Watersheds DOI Creative Commons
Aristeidis Kastridis, Georgios Theodosiou, Georgios Fotiadis

et al.

Hydrology, Journal Year: 2021, Volume and Issue: 8(4), P. 170 - 170

Published: Nov. 15, 2021

The aim of this study is to investigate the flood management and mitigation measures in ungauged NATURA protected watersheds. examined watersheds are located one most European significant areas (Prespa Natural Park North Greece). SCS-CN model was applied perform hydrological modeling for extreme rainfalls 50, 100 1000 return periods. Extensive field research conducted record all hydrotechnical works area, evaluate their current condition measure respective hydraulic characteristics. results showed that danger area generally low. However, almost half could not discharge high medium probability (50 years) peak flows. main causes extremely dense riparian vegetation has been developed on banks thalweg riverbeds some cases inappropriate dimensioning technical works. intense development vegetation, increased roughness coefficient reduced dimensions capability works, while restrictions regulations may be limiting any logging trimming activities within streams, especially priority habitat types. Special Ecological Evaluation studies educating public about necessity control impact, provide a framework thorough discussion areas.

Language: Английский

Citations

26
Evaluation of reservoir sedimentation using bathymetry survey: a case study on Adebra night storage reservoir, Ethiopia DOI Creative Commons

Yitbarek Andualem Mekonnen,

Tamene Dagnaw Mengistu,

Asimamaw Nigusie Asitatikie

et al.

Applied Water Science, Journal Year: 2022, Volume and Issue: 12(12)

Published: Nov. 2, 2022

Abstract Reservoir sedimentation is a serious challenge that reduces reservoir life. Because it decreases the initial capacity of and has an impact on drinking water supply, irrigation, hydropower activities. Inadequate land activities poor management techniques cause soil erosion reduce storage capacity. As result, accurate sediment estimation was assist in adoption sustainable land-use best practices lead to effective operations. The main objective this study evaluate rate remaining Adebra night (NSR) using bathymetric survey Arc-GIS 10.8. A comparison original current used quantity deposition reservoir. latter developed 10.8 bathymetry develop TIN surface volume. NSR decreased by accumulation from 36,902 m 3 2012 27,722 2020. results showed had lost average 24.8% its due sedimentation, during 8 years operation. estimated be 1147.5 /year, with loss 3.1% per year. value rates found live area /year. At time, expected life reduced lack proper conservation catchment areas. In general, finding year throughout design period. Therefore, improve should planning implementing different control removal, depending production watersheds inlets outlets reservoirs.

Language: Английский

Citations

11
Application of the MUSLE Model and Potential Effects of Climate Change in a Small Alpine Catchment in Northern Italy DOI Open Access
Francesca Berteni, Arianna Dada, Giovanna Grossi

et al.

Water, Journal Year: 2021, Volume and Issue: 13(19), P. 2679 - 2679

Published: Sept. 28, 2021

The evaluation of sediment yield by water erosion taking into consideration the possible impact climate change is object this work, concerning use Modified Universal Soil Loss Equation (MUSLE) in an Italian case study. This empirical model was implemented a Geographical Information System, account Alpine hydrology and geomorphological parameters, which are crucial analysis intensity variability production processes. study Guerna Creek basin, small-sized mountain watershed placed Lombardy, South-Central Alps (Northern Italy). In recent decades it has been hit at same time floods erosive phenomena, showing its hydraulic-hydrological weakness. Three future scenarios from 2041 to 2060, around middle century, were built according CORDEX data referring three different Representative Concentration Pathways (RCP 2.6, RCP 4.5, 8.5). findings showed that climate, basin scale might 24–44% for single heavy storm current century.

Language: Английский

Citations

12
Isotopic and trace element record of changing metal source contributions to tropical freshwater Lake Naivasha (Kenya) DOI Creative Commons
Carolina Rosca, Annett Junginger, Simon Kübler

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 951, P. 175082 - 175082

Published: Aug. 7, 2024

Language: Английский

Citations

1
Soil erosion and sediment yield modeling for the Maruba dam catchment, Machakos County, Kenya DOI
Allois Luvai, John P. O. Obiero, Christian Omuto

et al.

Modeling Earth Systems and Environment, Journal Year: 2022, Volume and Issue: 8(4), P. 5723 - 5742

Published: Aug. 3, 2022

Language: Английский

Citations

6
Physicochemical Properties of Bottom Sediments in Maruba Dam Reservoir, Machakos, Kenya DOI Creative Commons
Allois Luvai, John P. O. Obiero, Christian Omuto

et al.

Applied and Environmental Soil Science, Journal Year: 2022, Volume and Issue: 2022, P. 1 - 9

Published: June 16, 2022

Bottom sediments form an integral part of the aquatic ecosystem, where they serve as important sinks for contaminants. However, management options bottom require analysis physical and chemical properties. Therefore, aim this study was to assess physicochemical properties in Maruba dam reservoir order inform their potential use. The were obtained from three sampling points using a vibe-coring device. samples analyzed grain size, sediment bulk density, pH, electrical conductivity, organic matter content, nutrient content (nitrogen, phosphorous, potassium) standard laboratory procedures. results revealed that predominantly clay (56%). mean pH value 6.63, which found be slightly acidic. concentration cations anions quite high, with 0.225 dS⋅m−1. rich (2.10%) had density 0.620 g·cm−3. macronutrients potassium, phosphorous) values 0.12%, 0.46%, 12.81 mg·kg−1, respectively. established finely grained particles together effect on availability sediments. evaluated use agricultural activities or even land reclamation.

Language: Английский

Citations

5