Effect of integrated reservoir tillage for  in-situ  rainwater harvesting and other tillage practices on soil physical properties

Salem, Haytham M.; Valero, Constantino; Muñoz, Miguel Á.; Gil-Rodríguez, María

doi:10.1016/j.still.2015.02.009

Cited by 22 publications

(17 citation statements)

References 24 publications

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“…Our results suggest that compared with the control treatment under certain conditions, RT not only reduced soil erosion but also increased the sediment by more than 90%. This result is somewhat different from the conclusions of the role of RT in soil and water conservation in previous studies (Hackwell et al, ; Patrick et al, ; Salem et al, ). For example, Salem et al () pointed out that RT could reduce soil erosion and surface runoff.…”

Section: Discussioncontrasting

confidence: 96%

“…This result is somewhat different from the conclusions of the role of RT in soil and water conservation in previous studies (Hackwell et al, ; Patrick et al, ; Salem et al, ). For example, Salem et al () pointed out that RT could reduce soil erosion and surface runoff. Compared with the control, the surface runoff and sediment concentrations were reduced by approximately 61% and 79%, respectively.…”

Section: Discussioncontrasting

confidence: 96%

“…We believe that in addition to the differences in the characteristics of RT, more importantly, the reason for the above result is related to the response of RT to rainfall‐erosion processes during rainfall. Salem et al () also suggested that depressions affect runoff and sediment yields.…”

Section: Discussionmentioning

confidence: 99%

“…Second, the pooling of excess rainwater in interception areas can increase the local soil infiltration rate due to high head depths (Fox, Le Bissonnais, & Bruand, ). Salem et al () explained that this mechanism was because the larger depression area created by depressions may increase lateral and longitudinal infiltration, leading to more rainwater infiltration into the soil during the first minutes of rainfall. Therefore, the greater the depression volume is, the more water is intercepted and the longer the flow initiation time on slopes.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, a field experiment was conducted by Ventura, Norton, Ward, López Bautista, and Tapianaranjo () in semiarid central Mexico during the 2002 rainy season; their results suggested that along with significantly reduced soil erosion and runoff and increased soil moisture content, the final grain yield of beans increased by approximately 100% in the field with RT. An in situ experiment reported by Salem, Valero, Ángel Muñoz, and Gil‐Rodríguez () suggested that RT enhanced the infiltration rate, increased the water harvesting efficiency, reduced runoff, and achieved the highest wheat yield.…”

Section: Introductionmentioning

confidence: 99%

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Surface microrelief changes affect the soil and water conservation benefits of rainwater harvesting tillage operation during rainfall events

Zhao

Hou

2019

Hydrological Processes

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Reservoir tillage (RT) improves the soil rainwater harvesting capacity and reduces soil erosion on cropland, but there is some debate regarding its effectiveness. The objective of this study was to further verify the effect of RT on soil erosion and explore the reasons for this effect by analysing microrelief changes during rainfall. Rainfall intensities of 60, 90, and 120 mm/hr and three slope degrees (5, 15, and 25°, representing gentle, medium, and steep slopes) were considered. A smooth surface (SS) served as the control. The microrelief changes were determined based on digital elevation models, which were measured using a laser scanner with a 2‐cm grid before and after rainfall events. The results showed that compared with the values for the SS, RT reduced both the runoff and sediment by approximately 10‐20% on the gentle slope; on the medium slope, although RT also reduced the runoff in the 90‐ and 120‐mm/hr intensity rainfall events, the sediment increased by 158.90% and 246.08%; on the steep slope, the sediment increased by 92.33 to 296.47%. Overall, when the runoff control benefit of RT was lower than 5%, there was no sediment control benefit. RT was effective at controlling soil loss on the gentle slopes but was not effective on the medium and steep slopes. This is because the surface depressions created by RT were filled in with sediment that eroded from the upslopes, and the surface microrelief became smoother, which then caused greater soil and water loss than that on an SS at the later rainfall stage.

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Section: Discussioncontrasting

confidence: 96%