Modelling and measurement of two-layer-canopy interception losses in a subtropical evergreen forest of central-south China

Abstract

Abstract.The original Gash analytical model and the sparse Gash's model were combined to simulate rainfall interception losses from the top-and sub-canopy layers in Shaoshan evergreen forest located in central-south China in 2003. The total estimated interception loss from the two canopy layers was 334.1 mm with an overestimation of 39.8 mm or 13.5% of the total measured interception (294.3 mm). The simulated interception losses of the top-and sub-canopy suggested that the simulated interception losses in the stages of "during storms" and "after storms" were in good agreement with the published ones. Both the original Gash model and the sparse model overestimated the interception losses, but the sparse model gave more accurate estimates than the original Gash model.

Requirements for throughfall monitoring: The roles of temporal scale and canopy complexity

“…First, due to the decreasing coefficient of variation with increasing event size (Fig. 5a) (Brauman et al, 2010;Carlyle-Moses et al, 2004;Holwerda et al, 2006;Loustau et al, 1992;Price and Carlyle-Moses, 2003;Staelens et al, 2006;Vrugt et al, 2003;Zhang et al, 2006;Zimmermann et al, 2009), the sampling effort necessary to reach a pre-specified error limit of mean throughfall estimates decreases alike (Kimmins, 1973;Price and Carlyle-Moses, 2003;Rodrigo and Àvila, 2001;Zimmermann et al, 2010). The results of our study are in line with these findings (Figs.…”

“…A sample size of 10 to 50 funnel-type collectors seems to be typical for many studies (Fig. 4, Supplementary material S1); only a few throughfall and interception studies had sampling schemes which involved a larger number of collectors (Gerrits et al, 2010;Manfroi et al, 2006;Price and Carlyle-Moses, 2003;Zhang et al, 2006). For trough-type collectors we tested sample sizes of 2, 5, 10, 20, and 50.…”

Interceptação das chuvas em um fragmento de floresta da Mata Atlântica na Bacia do Prata, Recife, PE

“…Embora alguns pesquisadores tenham obtido sucesso com seu uso, na teoria o modelo superestima a perda por interceptação em florestas escassas. Por conta dessa deficiência, Gash et al (1995) e Valente et al (1997, respectivamente, revisaram o modelo original para aplicação nessas florestas (ZHANG et al, 2006). Apesar da grande importância que uma floresta exerce dentro do contexto do balanço hídrico local, ainda são poucos os estudos sobre a partição das chuvas por floresta de Mata Atlântica (ARCOVA, 2003).…”

Modelling rainfall interception loss in forest restoration trials in Panama

“…Operating in a pine-oak stand in Mexico's Sierra Madre Oriental, Carlyle-Moses and Price (2007) found that the single storm versions of both Liu and Gash models underestimated empirical I c because predetermined S c and E c values were too small. Finally, there is growing evidence that E c inferred from throughfall is generally higher than E c derived from the Penman-Monteith equation (Zhang et al, 2006, and citations therein), which would lead to a general overestimation of I c , as in our study.…”