Recarga de aquífero aluvial sob uso agrícola

Abstract

The core in the exploitation of groundwater is its renewal, which is not usually performed in the same proportion of the abstraction. This may result in an exploration of parts of the permanent reserves of the aquifer, with the risk of severe depletion, when the abstraction is not properly monitored. This study aims to estimate the groundwater recharge in the rural area of Pesqueira (PE) from 2002 to 2011. Alluvial aquifers are strategic for communal farming in the Brazilian semiarid. The methodology used was the water balance of Thornthwaite & Mather and variation of the water level. The first considers climatological and pedological elements for the analysis of the aquifer recharge, while the second method directly analyzes the change in the groundwater level in relation to the storage coefficient of water in the soil. It was found that all the years of the study period showed a deficit of moisture in the soil, in the "late dry period". Results were similar for both methods, being both effective in estimating aquifer recharge in the region.

Temporal dependence of potentiometric levels and groundwater salinity in alluvial aquifer upon rainfall and evapotranspiration

“…Figure 4 shows the temporal mapping of groundwater levels ( Figure 4A, B and C) and the average map of the monthly means levels for stable piezometers ( Figure 4D). The maps present annual ranges, point out wet and dry years, and the months in which the influence of rainfall was stronger for recharge (ALBUQUERQUE et al, 2015). The map for means values represents well the dry periods in red, for 2003 and 2013, highlighting the droughts seasonality in the region ( Figure 4I).…”

“…Mimoso alluvial valley in the Northeast semiarid has been intensively instrumented (MONTENEGRO, 1997), monitored and studied for groundwater recharging mechanisms (ALBUQUERQUE et al, 2015), groundwater spatial distribution (FONTES JÚNIOR et al, 2012;MONTENEGRO;, soil salinity spatial variation (MONTENEGRO et al, 2010), for agricultural support evaluation (SOUZA et al, 2011).…”

Impact of Land Use Change on the Water Balance in a Representative Watershed in the Semiarid of the State of Pernambuco Using the Swat Model

“…The CH_K2 channel parameter relates to alluvial regions with the river section (Albuquerque et al, 2015) and CH_N2 at the low water flow velocity on the subbasin surfaces and in the main channel (Du et al, 2013). Indeed, in the semi-arid basins, shallow soils predominate, with underlying crystalline basement.…”

Influence of sewage disposal on the water quality of the Sucuru River alluvial aquifer in the municipality of Sumé-PB, Brazil

“…The main point in the exploitation of groundwaters lies in the renewal of this resource, which does not occur at the same rate of extraction. This may result in the exploitation of parts of the permanent reserves of the aquifer with risk of exhaustion, when the withdrawal is not properly monitored (ALBUQUERQUE et al, 2015).…”