DIMENSIONLESS SYNTHETIC UNIT HYDROGRAPH AT GEMBONG WATERSHED, PASURUAN REGENCY-EAST JAVA PROVINCE OF INDONESIA

Authors

  • Mohammad Bisri
  • Lily Montarcih Limantara
  • Laksono D. Nugroho

Keywords:

Dimensionless Synthetic Unit hydrograph, Collins Method

Abstract

This study aims to establish the model of Dimensionless Synthetic Unit Hydrograph at
Gendong Watershed, Pasuruan Regency-East Java Province of Indonesia. The observed data of Automatic
Water Level Recorder at Gembong Warungdowo was used in this research and the Automatic Rainfall
Recorder at P3GI (Sugar Factory Central Research of Indonesia) from 2008 until 2011. The model was
differentiated by using the Collins Method. The result showed that the suitable model at Gembong watershed
is as follow: the rising limb curve is Qn = Qp + 0.615 (t-Tp) and the recession line curve is Qt = Qp x e0.30 (TP-t).
This result was based on the regression statistical analysis with the highest correlation of R2
=0.993 and the
standard error minimum of SEY=1.143 for the rising limb curve, however, for the recession line curve is
R=0.906 and SEY=0.415. The model is as follow: the rising limb is Qn = Qp + 0.615 (t-Tp) and the recession
line is Qt = Qp x e 0.30 (TP-t) .

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Published

2018-04-23

How to Cite

Mohammad Bisri, Lily Montarcih Limantara, & Laksono D. Nugroho. (2018). DIMENSIONLESS SYNTHETIC UNIT HYDROGRAPH AT GEMBONG WATERSHED, PASURUAN REGENCY-EAST JAVA PROVINCE OF INDONESIA. GEOMATE Journal, 15(50), 107–112. Retrieved from https://geomatejournal.com/geomate/article/view/967

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