Método para a espacialização dos elementos do balanço hídrico climatológico

Abstract

Resumo -O objetivo deste trabalho foi desenvolver e avaliar um método de espacialização dos elementos do balanço hídrico climatológico (BHC). O método utiliza modelos digitais do terreno que contêm a distribuição espacial dos elementos climáticos de entrada do BHC. A avaliação foi feita com dados reais de BHC referentes a 110 estações pluviométricas do Estado do Espírito Santo. Comparou-se o desempenho do método proposto com o dos seguintes interpoladores espaciais: krigagem e inverso de uma potência da distância. O método proposto apresentou melhores estimativas espaciais de todos os elementos do balanço hídrico -evapotranspiração real, excedente, deficiência e disponibilidade hídrica.Termos para indexação: deficiência hídrica, excedente hídrico, interpolação, krigagem. Method for spatialization of the climatic water balance elementsAbstract -The objective of this work was to develop and evaluate a method for the spatial distribution of the climatic water balance (CWB) elements. The method applies terrain digital models containing the spatial distribution of climate elements used as input data of CWB. Evaluation was made with existing CWB data from 110 pluviometric stations of Espírito Santo state, Brazil. The proposed method's performance was compared to the one of the following spatial interpolators: kriging and inverse distance weighting. The proposed method presented best predictions of the spatial distribution of all CWB elements -actual evapotranspiration, water deficit, water surplus and water availability.

Espacialização de variáveis meteorológicas para o polo de desenvolvimento Petrolina-Juazeiro: Umidades relativa

“…The good results found in the correlation of the values of the measured and estimated humidity were not found in the studies with climatic data by Castro et al (2010) and of Cecílio et al (2012). This distinct result for the interpolation of climatic data that subsidizes the Climatological Water Balance by IQD may be related to the choice of the best power for the method, whose authors varied the power in unit value up to 4, while the current study varied from decimal form until the power 25.…”

Climatological Water Balance With Data Estimated by Tropical Rainfall Measuring Mission for the Doce River Basin

“…According to Cecílio et al (2012), there is a tendency to occur the highest values of ETR in the vicinity of the coast, with a consequent reduction towards the west of the state, which indicates marked influence of the longitude, the ocean and, mainly, the relief. The errors of ETR and DEF, EXC and ETR/ETP were higher in the region near the coast, in Lower Doce (ES) and part of theg Doce (MG).…”

Green Water Footprint and Sustainability for Espirito Santo State

“…Green WF was spatially calculated for the entire state, in 1 x 1-km pixels, based on the Climatic Water Balance (CWB), using the method of THORNTHWAITE & MATHER (1955), from which the actual crop evapotranspiration (ETR) was obtained using control rainfall and evapotranspiration data (ET 0 ). The elements of CWB were spatially calculated following an adaptation of the methodology presented in CECÍLIO et al (2012). The description of the data used and the calculation procedures performed are described below.…”