Identification and prioritization of critical erosion areas based on onsite and offsite effects

Ghafari, Heidar; Gorji, M.; Arabkhedri, Mahmood; Roshani, Ghorban Ali; Heidari, Ahmad; Akhavan, Samira

doi:10.1016/j.catena.2017.03.014

Cited by 22 publications

(13 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Due to these effects the soil and water resources are under threat and the productivity of land is decreasing which ultimately leads to a reduction in agricultural production. The accelerated soil erosion is a serious agro-environmental threat to food security and agriculture sustainability worldwide [3,22,23] .…”

Section: Introduction mentioning

confidence: 99%

Parameter evaluation for soil erosion estimation on small watersheds using SWAT model

Hussain

Nabi

et al. 2019

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

This research was undertaken for the evaluation of soil erosion using the semi-distributed basin scale SWAT model for four subcatchments of the Dhrabi River Catchment (DRC), which is located in the Pothwar Plateau region. Two subcatchments (catchment-25 and -31) are characterized by gullies while the other two (catchment-27 and -32) are managed with terraced landuse system. The performance of the model was satisfactory with coefficient of determination (R 2 ) = 0.67 to 0.91 and Nash-Sutcliffe efficiency (E NS ) = 0.54 to 0.85 for both surface runoff and sediment yield during the calibration (2009)(2010) and validation (2011) periods. The P USLE factor was found to be the most sensitive parameter during model calibration.It was observed that all of the rainfall-runoff events occurred during the monsoon season (June to September). The estimated annual sediment loss ranged from 2.6 t/hm 2 to 31.1 t/hm 2 over the duration of the simulation period for the non-terraced catchments, in response to annual precipitation amounts that were between 194.8 mm to 579.3 mm. In contrast, the predicted annual sediment levels for the terraced catchments ranged from 0.52 t/hm 2 to 10.10 t/hm 2 due to similar precipitation amounts. The terraced catchments resulted in 4 to 5 times lower sediment yield as compared to non-terraced catchments. The results suggest that there is a huge potential for terraces to reduce soil erosion in the DRC specifically and Pothwar area generally, which have proven to be an efficient approach to establishing soil and water conservation structures in this region.

show abstract

Section: Introduction mentioning

confidence: 99%

Parameter evaluation for soil erosion estimation on small watersheds using SWAT model

Hussain

Nabi

et al. 2019

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

show abstract

“…Vegetation has been widely re‐established in the river basin since 1999 through the “Grain for Green” project, that is, transforming cultivated land to forest or grassland (Zhang et al, ), and the native or plantation grass species are recommended (Cui et al, ; Klausmeier, ). However, in the semiarid area, vegetation restoration needs to be optimized due to the limited rainfall and a relatively dry surface soil (Fu, Hu, Chen, Honnay, & Gulinck, ; Ghafari et al, ; Phua & Minowa, ; Wang, Shao, & Shao, ). Although vegetation restoration has been underway in this basin for some time, we are still not sure about how soil erosion on sloping land is related to the distribution of vegetation (Cerdà, ; Puigdefábregas, ; Turnbull, Wainwright, & Brazier, ; Zhang, Li, Li, Yu, & Li, ).…”

Section: Introductionmentioning

confidence: 99%

How the spatial distribution of grass contributes to controlling hillslope erosion

Pan

2019

Hydrological Processes

View full text Add to dashboard Cite

The aim of this study was to investigate how the spatial distribution of grass influenced run-off and erosion from a hillslope with loess and cinnamon soils in the rocky area of Northern China. We set up a trial to test the two soils with different treatments, including bare soil (BS), grass strips on the upper (UGS) and lower (DGS) parts of the slope, grass cover over the entire slope (GS), and a grass carpet on the lower part of the slope (GC), under simulated rainfall conditions. The results showed that the run-off coefficients for the loess and cinnamon soils decreased by between 4% and 20% and by between 2% and 37%, respectively, when covered with grass.Grass spatial distribution had little effect on the run-off, but more effect on erosion than vegetation coverage degree. The most effective location of grass cover for decreasing hillslope erosion was at the foot, and the high efficiency was mainly due to controlling of rill formation and sediment deposition. The soil loss from GS, DGS, and GC on the loess and cinnamon soils was between 77% and 93% less and 55% and 80% less, respectively, compared with the loss from BS. However, the soil characteristics had little effect on soil erosion for well-vegetated slopes. The results highlight the importance of vegetation re-establishment at the foot of hillslope in controlling soil erosion.

show abstract

“…Other approaches include empirical models (mainly Universal Soil Loss Equation-USLE, or Revised Universal Soil Loss Equation-RUSLE) [14,18,20,22,23,47], or physically-based models. either spatially distributed or spatially lumped (e.g., Soil Water Assessment Tool-SWAT [12,[48][49][50] and Water Availability in Semi-Arid environments-SEDiments-WASA-SED [51]). Example concepts of relationships between dominant factors leading to detachment of sediment, sediment transport and delivery to a target: (A) Approach applied in this study.…”

Section: Mapping Approaches Under Constraints Of Data Unavailabilitymentioning

confidence: 99%

“…1. ordinary decision rule matrix [16]; 2. threshold-based prioritization [20]; 3. value-based classification, including heat maps or percentiles (e.g., [49] and Figure 7); 4. geostatistically-based prioritization (e.g., statistic in spatial-temporal domain, [69,95,97], Furthermore, environmental and societal factors can be used in analyses targeted at soil and water conservation measures [20,102]. Prioritization was performed in multiple ways:…”

Section: How To Validate and Prioritize Hotspots?mentioning

confidence: 99%

Mesoscale Mapping of Sediment Source Hotspots for Dam Sediment Management in Data-Sparse Semi-Arid Catchments

Smetanová

Müller

Zargar

et al. 2020

Water

View full text Add to dashboard Cite

Land degradation and water availability in semi-arid regions are interdependent challenges for management that are influenced by climatic and anthropogenic changes. Erosion and high sediment loads in rivers cause reservoir siltation and decrease storage capacity, which pose risk on water security for citizens, agriculture, and industry. In regions where resources for management are limited, identifying spatial-temporal variability of sediment sources is crucial to decrease siltation. Despite widespread availability of rigorous methods, approaches simplifying spatial and temporal variability of erosion are often inappropriately applied to very data sparse semi-arid regions. In this work, we review existing approaches for mapping erosional hotspots, and provide an example of spatial-temporal mapping approach in two case study regions. The barriers limiting data availability and their effects on erosion mapping methods, their validation, and resulting prioritization of leverage management areas are discussed.

show abstract

Identification and prioritization of critical erosion areas based on onsite and offsite effects

Cited by 22 publications

References 48 publications

Parameter evaluation for soil erosion estimation on small watersheds using SWAT model

Parameter evaluation for soil erosion estimation on small watersheds using SWAT model

How the spatial distribution of grass contributes to controlling hillslope erosion

Mesoscale Mapping of Sediment Source Hotspots for Dam Sediment Management in Data-Sparse Semi-Arid Catchments

Contact Info

Product

Resources

About