Jurnal TANAH TROPIKA (Journal of Tropical Soils), Vol 22, No 2

Font Size:  Small  Medium  Large

Parameter Sensitivity Test of SWAT Hydrological Model On Two Different Resolutions (Case Study: Sub-Das Cisadane Hulu, West Java)

Nurmaranti Alim, Suria Darma Tarigan, DPT Baskoro, Enni Dwi Wahjunie

Abstract


A sensitivity analysis of SWAT parameters conducted on different input resolutions. The analysis will determine the input parameters that have the most influence on the role of output.Resolution of different inputs in the SWAT analysis, parameters can produce different inputs so as to cause the effect on output. The purpose of this study was to identify the level of sensitivity of the parameters in the model SWAT on two different resolutions, i.e. 1: 100 000 and 1: 250 000. A sensitivity test wasconducted manually by using the method that is absolute sensitivity to change (either increase or decrease) in each data base SWAT model parameters one by one while the other parameters fixed. NSE value of calibration for both of scale resolution demonstrates the similar NSE value, with the category on a daily simulation quite satisfactory (values   NSE 0.55 and 0.54), while the monthly simulation as very satisfactory (NSE value of 0.80 and 0.82). The level of sensitivity parameters is divided into three groups: sensitive, less sensitive and insensitive. Simulation daily and monthly for both of scale shows the parameter-sensitive parameters are the same that Alpha_BNK (baseflow alpha factor for bank storage) , CN2 (moisture condition II curve number), CH_K2 (effective hydraulic conductivity in main channel alluvium), CH_N2 (manning’s “n” value for the main channel), ESCO (soil evaporation compensation factor), GW_Delay (groundwater delay), and GW_Revap (groundwater “revap” coefficient).

Keywords: Absolute method sensitivity, group parameter sensitivity, simulation daily and monthly


References


Cibin R, Sudheer K P, Chaubey I. 2010. Sensitivity and Identifiability of Stream Flow Generation Parameters of The SWAT Model. HYDROLOGICAL PROCESSES Hydrol. Process. (2010) Published online in Wiley InterScience (www.interscience.wiley.com) DOI: 10.1002/hyp.7568.
Indarto. 2010. Hidrologi, Dasar Teori dan Contoh Aplikasi Model Hidrologi. Bumi Aksara. Jakarta.
Mulungu DMM, Munishi SE. 2007. Simiyu River Catchment Parameterization Using SWAT Model. Physics and Chemistry of the Earth 32 (2007) 1032–1039. 1474-7065/$ - see front matter _ 2007 Published by Elsevier Ltd. doi:10.1016/j.pce.2007.07.053
Nash JE. Sutcliffe JV. 1970. River Flow Forecasting Through Conceptual Models Part I – Discussion of Principles. Journal of Hydrology, 10 (3): 282-190
Neitsch SL, Arnold JG, Kiniry JR, Williams JR, King KW. 2005. Soil and Water assessment tool: theoretical documentatioan Version 2005. Tersedia di http://www.brc.tamus.edu/swatdownloads/doc.
Rinaldi A. 2010. Pemodelan hidrograf satuan universal (H2U) pada berbagai skala peta dasar berbasis sistem informasi geografis.[tesis]. Bogor (ID). Institut Pertanian Bogor.
Spruill CA, Workman SR, Taraba JL. 2000. Simulation Of Daily And Monthly Stream Discharge From Smallwatersheds Using The Swat Model. Transactions of the ASAE VOL. 43(6): 1431-1439 2000 American Society of Agricultural Engineers.
Xiaomeng S, Chesheng Z, Jun X, Fanzhe K. 2012. An efficient global sensitivity analysis approach for distributed hydrological model. Journal of Geographical Sciences. 2012, 22(2): 209-222.

Full Text: PDF

Refbacks

  • There are currently no refbacks.


University of OxfordCOPACColumbia University LibraryStanford Crossref EBSCO

DOAJ

 

Print ISSN 0852-257X, Online ISSN 2086-6682