Landscape Drivers of Floods Genesis (Case Study: Mayo Mizao Peri-Urban Watershed in Far North Cameroon)

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

ACS Applied Electronic Materials Pub Date : 2024-06-12 DOI:10.3390/w16121672

Lucas Bouba, P. Ayral, S. Sauvagnargues

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引用次数: 0

Abstract

Landscape has significant effects on hydrological processes in a watershed. In the Sudano-Sahelian area, watersheds are subjected to a quick change in landscape patterns due to the human footprint, and the exact role of the actual landscape features in the modification of the hydrological process remains elusive. This study tends to assess the effects of landscape on the genesis of the runoff in the Mayo Mizao watershed. To achieve this goal, 62 infiltration tests were performed at different points and depths (5 cm and 20 cm) using the double-ring method and the Porchet method. The results show that the combination of many factors (soil type, land use, and farming practices) can guide the hydraulic conductivity behavior of soils. For example, at 5 cm depths, clayey-evolved soils, such as vertisols and halomorphic soils, inhibit infiltration, as opposed to non-evolved mineral soils, such as lithosols and clayey-sandy soils. However, at 20 cm depths, gray soils with halomorphic tendencies followed by vertisols have a low sensitivity to infiltration, as opposed to soils derived from loose materials and halomorphic soils. For a given soil type, rainfed crops are the primary land use that runs against infiltration. However, the effect of tillage varies according to the soil type. Finally, given the extent of vertisols and halomorphic soils in the Far North region of Cameroon in general, and in the Mayo Mizao watershed in particular, and regarding the increase in cultivated areas, a probable reduction in the infiltration capacity of soils in this region is to be expected in the medium term. The results of this study can be used as a basis for land-use planning and sustainable watershed management in semi-arid tropical zones.

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洪水成因的景观驱动因素（案例研究：喀麦隆最北部的马约-米佐（Mayo Mizao）城市周边流域

景观对流域的水文过程有重大影响。在苏达诺-萨赫勒地区，由于人类的足迹，流域的地貌格局发生了迅速变化，而实际地貌特征在水文过程中的确切作用仍然难以确定。本研究旨在评估景观对马友水尾流域径流成因的影响。为此，采用双环法和波尔谢法在不同点和不同深度（5 厘米和 20 厘米）进行了 62 次渗透试验。结果表明，多种因素（土壤类型、土地利用和耕作方式）的结合可以引导土壤的导水行为。例如，在 5 厘米深处，粘质演变土壤（如 vertisols 和 halomorphic 土壤）与非演变矿物土壤（如 lithosols 和粘质砂土）相比，会抑制渗透。然而，在 20 厘米深处，具有卤化倾向的灰土和 vertisols 对入渗的敏感性较低，而松散物质土壤和卤化土壤对入渗的敏感性较高。在特定的土壤类型中，雨水灌溉作物是不利于下渗的主要土地利用方式。不过，耕作的影响因土壤类型而异。最后，鉴于喀麦隆远北地区，特别是马约米佐流域的蛭石土壤和卤化土壤的范围，以及耕地面积的增加，预计该地区土壤的渗透能力在中期内可能会下降。这项研究的结果可作为半干旱热带地区土地使用规划和可持续流域管理的依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico