Development of Rainfall-runoff Model Using Tank Model: Problems and Challenges in Province of Aceh, Indonesia

Development of Rainfall-runoff Model Using Tank Model: Problems and Challenges in Province of Aceh, Indonesia

Abtstract - Rainfall-runoff model using tank model founded by Sugawara has been widely used in Asia. Many researchers use the tank model to predict water availability and flooding in a watershed. This paper describes the concept of rainfall-runoff model using tank model, discuss the problems and challenges in using of the model, especially in Province of Aceh, Indonesia and how to improve the outcome of simulation of tank model. Many factors affect the rainfall-runoff phenomena of a wide range of watershed include: soil types, land use types, rainfall, morphometry, geology and geomorphology, caused the tank model usefull only for concerning watershed. It is necessary to adjust some parameters of tank model for other watershed by recalibrating the parameters of the model. Rainfall runoff model using the tank model for a watershed scale is more reasonable focused on each sub-watershed by considering soil types, land use types and rainfall of the concerning watershed. Land use data can be enhanced by using landsat imagery or aerial photographs to support the validation the existing of land use type. Long term of observed discharges and rainfall data should be increased by set up the AWLR (Automatic Water Level Recorder) and rainfall stations for each of sub-watersheds. The reasonable tank model can be resulted not only by calibrating the parameters, but also by considering the observed and simulated infiltration for each soil and land use types of the concerning watershed. Key words: rainfall-runoff model, tank model, infiltration, land use types, soil types, watershed

Basri, Hairul; Faculty of Agriculture, Syiah Kuala University, Banda Aceh 23111, Indonesia Corresponding author.

Aceh International Journal of Science and Technology; Vol 2, No 1: January - April 2013

2088-9860

Graduate School of Syiah Kuala University

2013-04-02

http://jurnal.unsyiah.ac.id/AIJST/article/view/574/484

application/pdf

eng

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion

Peer-reviewed Article

http://jurnal.unsyiah.ac.id/AIJST/article/view/574

10.13170/aijst.2.1.574