卡廷加保存土壤水动力特性的变异及空间分布

Pub Date : 2021-08-09 DOI:10.1590/2318-0331.262120210058
José Martins de França Neto, A. P. Coutinho, S. D. Prima, Saulo de Tarso Marques Bezerra, Severino Martins dos Santos Neto, Ana Emília Carvalho de Gusmão da Cunha Rabelo, A. Oliveira, A. Antonino
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引用次数: 1

摘要

摘要:土壤保水和导水功能是表征和模拟渗透区渗透和水转移过程不可或缺的因素。就巴西半干旱地区而言,其特点是水资源匮乏,因此缺乏关于土壤水动力特性的资料。此外,这些特性有许多可变性因素,需要表征它们的大小和在空间中的分布。本研究分析了卡廷加天然林土壤的入渗过程和水动力特性,观察了其空间分布。这种植被是巴西半干旱地区的典型。其中一个在大约875平方米的面积上开发了一个48点网格,并在其上应用了Beerkan方法。分析是基于最佳斜率算法的应用和位置、分散和粘附试验的统计测量进行的。结果表明,尽管验证了该区域的均匀纹理,但水动力特性的中高变异性指数具有随机空间分布。因此,土壤结构在水分入渗过程中起主导作用。
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Variability and spatial distribution of hydrodynamic properties in soil with preserved Caatinga
ABSTRACT The functions of soil water retention and hydraulic conductivity are indispensable for the characterization and modeling of the infiltration and water transfer processes in the vadose zone. In the case of the Brazilian semi-arid region, characterized by the scarcity of water resources, there is a lack of information on the hydrodynamic properties of the soil. Also, these properties have numerous factors of variability, requiring the characterization of their magnitude and distribution in space. This research presents an analysis of the infiltration process and the hydrodynamic properties of the soil under native Caatinga forest, observing its spatial distribution. This vegetation is typical of the Brazilian semi-arid region. One developed a 48-point grid in an area of approximately 875 m2, and applied on it the Beerkan methodology. The analyzes were performed based on the application of the BEST-Slope algorithm and statistical measures of the position, dispersion, and adherence tests. The results showed medium to high variability indices for the hydrodynamic properties, with random spatial distribution, despite the verification of a homogeneous texture in the area. Thus, it was found that the soil structure was predominant in the processes of water infiltration.
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