STUDI PENDAHULUAN TENTANG PENERAPAN METODE AMBANG BERTINGKAT UNTUK ANALISIS KEKERINGAN HIDROLOGI PADA 15 DAS DI WILAYAH JAWA TIMUR
Abstract: This research deals
with identification of potential hydrological drought at 15 watersheds in
Eastern part of East Java Province. Hydrological drought events is indicated by
water deficits at the main river of the watersheds during certain period of
record. Discharge data from 15 watersheds in East Java are used as main input
for this analysis. TLM modul based on HydroOffice platform is used to calculate
the deficit. Deficit event is counted when the discharge during more than >
7 days is below the threshold level. The threshold level is set up using
percentile 90% (Q90). The value of Q90 is determined from discharge times
series. Furthermore, the discharge is rangked from high to low flow. Results
from TLM are then imported to EXCEL for further analysis. Furthermore, GIS
software package (Quantum GIS) is used for mapping the spatial variation of
discharge values (avarage, maximum, Q90), frequency and duration of deficits
events. This analysis produces the spatial maps of discharge value and deficit
events ( averaged annually).
Penulis: Indarto, Sri Wahyuningsih, Muhardjo Pudjojono,
Hamid Ahmad, Ahmad Yusron
Kode Jurnal: jppertaniandd140608