Influence of surface cover type on sediment transport capacity and sediment retardation benefits based on flume experiments

IF 6.1 1区农林科学 Q1 SOIL SCIENCE

Soil & Tillage Research Pub Date : 2025-01-21 DOI:10.1016/j.still.2025.106455

Kai Zhang , Ning Li , Suhua Fu , Hongli Mu

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引用次数: 0

Abstract

Sediment transport capacity (Tc) is a critical parameter in predicting soil erosion, and surface cover has been found to be an effective means for reducing Tc. However, limited research exists regarding the influence of surface cover types on Tc, and the sediment retardation benefits (SRB) of surface cover types are unknown. The aim of this study was to investigate the impact of different surface cover types on Tc and SRB. Therefore, a sets of flume experiment were conducted under controlled conditions, featuring a fixed slope gradient (S = 25.88 %), a constant unit flow discharge (q = 2.70 ×10^–3 m² s^–1), and three common types of surface cover commonly found on slope farmland: corn residue, rock fragment, and sweet potato). These experiments also included seven coverage levels (C = 0, 5, 10, 20, 30, 50 and 70 %) with water and sediment samples collected at regular intervals. The results showed that the relative sediment transport capacity (R_T) had a negative exponential function with a C under different surface cover types (R²>0.8). Sweet potato exhibited the most effective SRB under the same C. SRB stabilized when the C of different surface cover types reached 30 %. The equations for predicting sediment transport capacity were improved. The results may contribute to the theoretical understanding of sediment transport processes under surface cover conditions and provide a foundation for the informed selection of soil and water conservation measures.

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来源期刊

Soil & Tillage Research 农林科学-土壤科学

CiteScore

13.00

自引率

6.20%

发文量

266

审稿时长

5 months

期刊介绍： Soil & Tillage Research examines the physical, chemical and biological changes in the soil caused by tillage and field traffic. Manuscripts will be considered on aspects of soil science, physics, technology, mechanization and applied engineering for a sustainable balance among productivity, environmental quality and profitability. The following are examples of suitable topics within the scope of the journal of Soil and Tillage Research: The agricultural and biosystems engineering associated with tillage (including no-tillage, reduced-tillage and direct drilling), irrigation and drainage, crops and crop rotations, fertilization, rehabilitation of mine spoils and processes used to modify soils. Soil change effects on establishment and yield of crops, growth of plants and roots, structure and erosion of soil, cycling of carbon and nutrients, greenhouse gas emissions, leaching, runoff and other processes that affect environmental quality. Characterization or modeling of tillage and field traffic responses, soil, climate, or topographic effects, soil deformation processes, tillage tools, traction devices, energy requirements, economics, surface and subsurface water quality effects, tillage effects on weed, pest and disease control, and their interactions.