Developing Interception and Root Uptake Systems in Conceptual Hydrological Modelling

Nugroho Suryoputro, Widandi Soetopo, Ery Suhartanto, Lily Montarcih Limantara, Sugeng Utaya, . Suhardjono

Abstract


This research aimed at developing a conceptual hydrological model (tank model) with interception and root uptake. It was conducted in a sub-watershed of Coban Rondo located in an area with 89% forest and plantation land. 10-year rainfall and discharge data were used to perform calibration, verification and simulation. The calibration utilised a hybrid optimisation method of random search and genetic algorithm. A water balance equation was developed. The effect of interception and root uptake parameters on the modelling procedure was evaluated using the Nash-Sutcliffe Efficiency (NSE) coefficient and paired sample t-test. Results showed that, at a significance level of 5%, the interception and root uptake parameters had a significant effect on modelling (t Stat = 8.457 > t Critical two-tail = 1.980). The modelling performance increased by 26.98% with a NSE value of 0.91.

DOI: http://dx.doi.org/10.5755/j01.erem.74.3.21154


Keywords


Hydrological model, conceptual, interception, root uptake

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Print ISSN: 1392-1649
Online ISSN: 2029-2139