Interceptação da precipitação pelas copas em Pinus halepensis mill - Albacete - Espanha

Abstract

Hydrological processes are essential in understanding the redistribution of water in the forest ecosystem. The objectives were to evaluate the precipitation, interceptation by canopies, the effective rainfall, water infiltration, runoff and carrying of soil sediment. The studies were conducted in the water year 2014/2015, with Pinus halepensis Mill 32 years old, located in the Regional Centre de Estudios del Agua (CREA) at the Universidad de Castilla La Mancha in Albacete - Spain. Assessments of redistribution of precipitation were made using 03 external and 64 rain gauges under the canopy of the trees, trunk interceptômetro and infiltrometer on the ground. Data on average precipitation were 329,2mm, effective precipitation 229,6mm and the intercepting the tops of 30% and 70% of the precipitation that hits the ground. There was a high 66.4% of infiltration capacity with low runoff 10,9mm with carrying of 5,3 ton/ha/year. It is concluded that low intensity of precipitation was high intercept the tops, decreased effective precipitation and the total water infiltration into the soil. Already with high intensity, rainfall occurred decreased interceptation and increasing effective rainfall, water infiltration into the soil of 218.7 mm/year, which contributes significantly to the replenishment of groundwater.