Integrating Google Earth Engine and GIS for RUSLE-based soil erosion and sediment yield assessment in Borkena Watershed, Ethiopia

Journal of Sedimentary Environments, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

Language: Английский

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Impact of Intercropping on Nitrogen and Phosphorus Nutrient Loss in Camellia oleifera Forests on Entisol Soil

Forests, Journal Year: 2024, Volume and Issue: 15(3), P. 461 - 461

Published: March 1, 2024

Soil and water loss represent a significant environmental challenge in purple soil cropland China. However, the quantity mechanism of nutrient from remain unclear. To understand conservation address nitrogen (N) phosphorus (P) mitigation Camellia oleifera forest stands on slope farmland, this study aimed to explore resistance control effect N P such agricultural landscapes. In study, runoff plot experiment was conducted farmland. The included three distinct treatments: intercropping oil tea (Camellia oleifera) ryegrass (Lolium perenne L.), monoculture, barren land served as treatment (CK). Water samples were collected analyzed surface middle layer at depth 20 cm (interflow) plots under natural rainfall conditions 2023. Various components, including total (TN), dissolved (DN), nitrate (NO3−-N), ammonium (NH4+-N), particulate (PN), (TP), (DP), phosphate (PO4+-P), (PP), measured samples. results indicated that effectively mitigated various forms both interflow within Compared CK, reduced TN TP by 29.3%–37.3% 25.7%–38.9%, respectively. led decrease average TN, DN, NO3—N, NH4+-N 63.0, 24.3, 4.5, 6.8 g/ha, corresponding reductions 33.3%, 47.6%, 58.3%, 49.1%, respectively, compared CK. TP, DP, PP decreased 4.4, 1.8, 1.4 g/hm2 intercropping, reflecting 32.3%, 31.3%, 31.1%, most proportion observed PN solution, accounting for 53.3%–74.8% 56.9%–61.0% These findings establish foundation conservation. research provides valuable insights management policymakers developing erosion prevention programs sloping cultivated with forests soils. Additionally, it offers guidance source pollution regions.

Language: Английский

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Spatiotemporal Dynamics of Soil and Soil Organic Carbon Losses via Water Erosion in Coffee Cultivation in Tropical Regions

Sustainability, Journal Year: 2025, Volume and Issue: 17(3), P. 821 - 821

Published: Jan. 21, 2025

Water erosion has severe impacts on soil and the carbon cycle. In tropical regions, it is significantly influenced by rainfall, erodibility, rapid changes in land use cover (LULC), agricultural management practices. Understanding dynamics of water essential for implementing precise degradation control. This study aimed to estimate organic (SOC) losses due over five years a coffee-producing area Brazil using revised universal loss equation (RUSLE). The results revealed that average coffee plantation areas ranged from 1.77 1.80 Mg ha−1 yr−1, classified as very low. Total potential 2184.60 6657.14 ha−1, 305% difference, demonstrating efficiency vegetative (C factor) conservation practices (P reducing rates. SOC were less than 200 kg with averages 17.67 13.00 yr−1 areas. conclusion, practices, such presence native vegetation, maintaining rows, contour planting, improving agronomic techniques, are losses, even scenarios biennial alternation production. Thus, sustainable plays crucial role mitigating erosion, productivity, addressing climate change.

Language: Английский

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Research of Runoff and Sediment Yields on Different Slopes of Lancang River Arid Valley Under Natural Rainfall Conditions

Water, Journal Year: 2025, Volume and Issue: 17(7), P. 997 - 997

Published: March 28, 2025

Limited by water and heat conditions, the southwest alpine valley area has a dry climate, complex terrain, low vegetation coverage, very fragile ecological environment. The runoff plots of different slope gradients (10°, 15°, 20°), lengths (2, 5, 10 m) reverse terrace (RST) in Lancang River arid were taken as objects. Through situ observation sediment yield six natural erosive rainfalls, contribution rate factors was quantified, effect mechanism revealed. main results follows: (1) Sediment yields rainfalls closely correlated with rainfall type duration. Under conditions heavy rain (rain II III), there critical gradient, maximum achieved when gradient 15°. (2) reduction benefits horizontal terraces 24.88% 46.25%, these increased 1.47 times 1.30 after setting RST, significantly increase number RSTs (p < 0.05). (3) In this study, intensity contributed most to (34.5%), followed length (15.1%) (7.2%). Slope length, intensity, order 25.9%, 18.0%, 11.4% rate, respectively. (4) There significant linear correlation between on slopes decreased RST (2.91 times), it numbers. This study can provide scientific basis reference for prevention control soil loss restoration canyon area.

Language: Английский

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Effects of Erosion Control Works: Case Study–Reservoir Celije, Rasina River Basin, the Zapadna Morava River (Serbia)

Water, Journal Year: 2024, Volume and Issue: 16(6), P. 855 - 855

Published: March 15, 2024

The aim of this research was to analyze the impact implemented erosion control works (ECW) on soil intensity in watershed Ćelije reservoir (Rasina River) period between 1968 and 2022. Erosion Potential Method used calculate annual gross (W), sediment transport (G), coefficient (Z) study area. As a result performed ECW there general decreasing trend processes last 54 years. specific 1189.12 m3/km−2/year−1 1968, while 2022 it 554.20 m3/km−2/year−1. 540.18 253.55 Due changes processes, decreased by 634.92 286.63 reduced from Z = 0.62 0.35. A dependence slope siltation natural bed defined. results show significant correlation ECW, providing basis for future management defining strategy watershed.

Language: Английский

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Ecological risk assessment and spatial–temporal differentiation of soil and water resources in the Hefei metropolitan area

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: April 11, 2024

Abstract There are important ways to solve the ecological risk problems of regional water resources and soil resources, promote benign development involving scientific evaluation in Hefei metropolitan area, clarifying intrinsic evolution law identifying characteristics spatial temporal variations. Based on conceptual model “ST-QS-RR”, indicator system is constructed, CRITIC method used assign weights, TOPSIS method, kernel density markov chain resistance measure analyse explore main factors that cause resources. The results study show that: (1) area its cities a steady decline “high north low south, high west east”. (2) Most subsystems decreasing trend, with mainly concentrated QS system. (3) club convergence area. When type adjacent domain higher, change more sensitive.

Language: Английский

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Evaluation of soil loss severity and ecological restoration approach for sustainable agriculture in the Hindu Kush, Karakoram and Himalaya region

Journal of Mountain Science, Journal Year: 2024, Volume and Issue: 21(5), P. 1509 - 1521

Published: May 1, 2024

Language: Английский

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Effects of Erosion Control Works: Case Study –Reservoir Celije, Rasina River Basin, the Zapadna Morava River (Serbia)

Published: Feb. 13, 2024

The aim of this research was to analyze the impact implemented erosion control works (ECW) on soil intensity in watershed Ćelije reservoir (Rasina River) period between 1968 and 2022. Erosion Potential Method used calculate annual gross (W), sediment transport (G), coefficient (Z) study area. As a result performed ECW there general decreasing trend processes last 54 years. specific 1189.12 m3/km-2/year-1 1968, while 2022 it 554.20 m3/km-2/year-1. 540.18 253.55 Due changes decreased by 634.92 m3/km-2/year-1, 286.63 reduced from Z=0.62 Z= 0.35. A dependence slope siltation natural bed defined. results show significant correlation ECW, providing basis for future management defining strategy watershed.

Language: Английский

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Impact of Diverse Rainfall Patterns and Their Interaction on Soil and Water Loss in a Small Watershed within a Typical Low Hilly Region

Water, Journal Year: 2024, Volume and Issue: 16(3), P. 372 - 372

Published: Jan. 23, 2024

Assessing the impact of varied rainfall patterns on soil and water loss within a hilly watershed over an extended temporal scope holds paramount importance in comprehending regional runoff sediment traits. This study utilized continuous data spanning from 2013 to 2021, K-means clustering method was employed analyze types. Subsequently, rain-type characteristics underwent further analysis through LSD, multiple linear regression equation formulated. The result showed that: Qiaotou small basin, rainfall, maximum intensity 30 min (I30), erosivity exhibited notable effects yield loss. water-sediment attributes 305 events were characterized by below 100 mm, I30 less than 35 mm/h, coefficient 0.5, content under 0.6 g/L. According different types degree influence watersheds, basin divided into three method: A (heavy moderate rain), B (small light C (medium heavy rain). most frequent rain type observed B, followed C, while had lowest frequency. Despite lower B-type it significant importance. Conversely, C-type although intense short, serves as primary source production. effectively models both modulus flood peak discharge, exhibiting R2 exceeding 0.80, signifying significance. enables quantitative calculation pertinent indicators. Sediment primarily relies concentration, depth, discharge is significantly influenced I30. Furthermore, efficacy various conservation measures for flow reduction correlates with Overall, reducing increases higher I30, accompanied reduced fluctuation range.

Language: Английский

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Analisis Kemampuan Resapan Air pada Perubahan Tata Guna Lahan di DAS Melawi Kabupaten Melawi

Jurnal Ilmu Lingkungan, Journal Year: 2024, Volume and Issue: 22(6), P. 1594 - 1601

Published: July 9, 2024

Sub DAS Melawi mengalami peningkatan banjir setiap tahun akibat penurunan daerah resapan air yang disebabkan oleh perubahan tata guna lahan. Penelitian ini bertujuan untuk mengetahui lahan dan kemampuan di sub menggunakan parameter penggunaan lahan, curah hujan, kemiringan lereng, tekstur tanah, geohidrologi, gambut. Analisa data dilakukan menghasilkan peta kondisi air. Tata periode 1990 2020 dibandingkan sehingga terlihat lahannya. Hasil penelitian menunjukkan bahwa tidak terlalu banyak perubahan. Penggunaan terbesar yaitu pertanian kering campur kawasan hutan. Perubahan namun cukup luasan, didominasi kritis dengan dari 50% menjadi 62% 2020. Sementara itu signifikan terjadi pada sebesar 12% luas mencapai 15% 3%. Kondisi persentase melebihi setengah buruk.

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