Desempenho De Modelos De Infiltração Tridimensional De Água No Solo

Abstract

Revista Diálogos N. 18 -set./out. -2017 520 que visem estimar eventos como o balanço hídrico na localidade, a capacidade acumulativa de água no solo t ainda no seu desempenho na contribuição da drenagem urbana.Palavras-Chave: Infiltração de água no solo, modelos numéricos de infiltração, análise Estatística, drenagem urbana. Abstract:Water is a substantial natural resource for anthropogenic activities in a variety of settings. The processes that compose the hydrological cycle, such as infiltration, evapotranspiration and surface runoff are directly dependent on the physical environment to which they are located. It is therefore important to know how it is possible to characterize the infiltration of water into the soil and what the necessary means are for this. In a relevant region of the city of Recife, the objective was to analyze the performance of two numerical models of water infiltration in the soil: Haverkamp and Lassabatère (BEST). Field infiltration tests were performed using the simple ring infiltrometer. In addition to this, granulometry tests were also carried out to classify the studied soil and to use one of the methods, the tests of apparent density -through Uhland -and natural and saturated moistures. As a statistical parameter of performance analysis, the coefficient of determination and the Tukey test was used. The two models were highly efficient for the type of soil found in the region. The results obtained with the infiltration curves can be used in several prediction studies to estimate events such as water balance in the locality, cumulative water capacity in the soil and still its performance in the contribution of urban drainage.

Estimation of the Hydrodynamic Parameters of Soils Subjected to Water Scarcity: Application of BEST and Introduction of a Specific Methodology

“…Water infiltration tests in the soil have generated ordered pairs between time and cumulative infiltration as results, once equal and known volumes (15 ml) are added to the infiltrometer and the time it takes for water to infiltrate is counted [19]. These were performed in 140 mm diameter, 330 mm height transparent acrylic columns.…”

“…Just like BEST-slope, Junction Between [27] and [26] (JAHH) was created in two stages. The first, responsible for the particle size distribution analysis, is based on the model proposed by [27], and as an adjustment of the particle size curve, it used the model of three adjustment parameters proposed by [28], Equation 19,(19) where corresponds to the diameter of the soil particles, F(D) the percentage of particles with a diameter less than ; , and are the adjustment parameters, the minimum diameter of the soil particles, and the percentage of particles with a diameter less than or equal to .…”

Land-use change effect on the hydro-dynamic characteristics of soil in the Brazilian semi-arid region

“…Six point tests were performed in each of the plots, with three repetitions, totaling 36 samples. The simple-ring infiltrometer test is an excellent alternative considering attributes such as preparation and test execution costs, time required for its execution, and the fact that it has been used by various authors (Souza et al, 2016;Oliveira and Soares, 2017). A disadvantage of this infiltrator is that it does not characterize the surface sealing generated by the impact of rain drops.…”

Predição do escoamento superficial e consequentes alagamentos em centros urbanos

“…Por conta desta proximidade com corpos hídricos de grande porte, a área de estudo passou por diversos processos de aterro, o que levou a porção superficial do solo a ser composta por materiais com classificação textural de areia, areia franca ou franco-arenoso (OLIVEIRA et al, 2017). Durante os picos de marés altas, que neste estado do país (Pernambuco) possui um regime semi-diurno, as tubulações da rede coletora de águas pluviais que estão direcionadas para o rio ficam parcialmente ou totalmente submersas, dificultando o escoamento.…”

“…Entretanto, durante este processo, a capacidade que o solo tem de permitir que a água infiltre tende a diminuir até que o solo sature e os vazios estejam preenchidos majoritariamente por água, (SILVA et al, 2017;OLIVEIRA et al, 2018). Os componentes do balanço de água no solo como a infiltração, a evaporação e o escoamento superficial são dependentes diretos das características físicas do solo, ou seja, da composição granulométrica, do arranjo estrutural das partículas e dos parâmetros hidrodinâmicos (OLIVEIRA et al, 2017).…”