TY  - JOUR
T1  - The Characteristics of Unit Hydrographs with Different Scale of Antecedent Soil Moisture Condition
AU - , Sasmito AU - Triatmodjo, B. AU - Sujono, J. AU - Sri Harto, Br. 
JO  - Journal of Engineering and Applied Sciences
VL  - 11
IS  - 12
SP  - 2594
EP  - 2601
PY  - 2016
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2016.2594.2601
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2016.2594.2601
KW  - AMC
KW  -AMD
KW  -unit hydrograph
KW  -tank model
KW  -peak discharge
KW  -time to peak
AB  - Unit Hydrograph (UH) is a popular method for predicting flood caused by rainfall in a catchment. This
method has little flexibility to different storm, consequently the unit hydrographs produced differ considerably from
storm to storm. This is partially due to the unit hydrograph method ignores the influence of Antecedent Soil
Moisture Condition (AMC) on runoff generating processes. This paper presents the research result on the
characteristics of unit hydrograph with different scale of AMC. In this research the AMC was approached by
parameter of Antecedent soil Moisture Deficit (AMD) which has opposite meaning with the AMC. The AMD was
represented by the dependent variable of Sc (Storage capacity) that is the space volume remaining the soil moisture
evaporated. The research was conducted using hydrologic data (rainfall, discharge and evaporation) assembled from
four catchments. The characteristics of unit hydrograph were presented by peak discharge (qp) and time to peak
(tp) of unit hydrograph. The research experiment were performed using three parallel tanks and one serial tank model
of Yue and Hashino. The research result are concluded; the unit hydrographs derived with base-flow separation
using tank model (HSsim) show more consistent than the unit hydrographs calculated by conventional method
HScol; AMC influences the effective rainfall as the AMC becomes bigger than so do the effective rainfall as the
AMC trends to smaller than the peak discharge (q<sub>p</sub>) becomes smaller; the influence of AMC to time to peak (t<sub>p</sub>) cannot detected by this model.
ER  -