Telaga Kenyamukan generating discharge analysis with Thomas-Fiering method for North Sangatta raw water needs

Abstract

The Telaga Kenyamukan as a raw source of Kudungga WTP is studied to determine the water availability. Historical data used in hydrological analysis are sometimes incomplete or have a short time period, so the results may not match the conditions in the field. Hydrological analysis in this study used rainfall data from Pit-J and AB Station from 2005 to 2016, and climatology data from the Sepinggan Meteorological Station from 2005 to 2016. The discharge was analyzed by Mock method, then generated up to year of 2038 with the Thomas-Fiering method and obtained the dependable flow with the monthly basic method in a 90% probability, resulting in 467l/sec. The water requirements are calculated by projecting the population for the next 20 years, with the results of the RWC (Regional Water Company) total water demand in 2019 amounting to 259.99 l/sec and increasing up to 2038 to 630.32 l/sec. With a water balance analysis, the water availability in the next 20 years in meeting needs is in a surplus condition, but in RWC water supply systems which depend on Water Treatment Plant capacity, since 2028 the WTP capacity must be increased due to a deficit of -12.57 l/sec.

Pemodelan Perubahan Morfologi Sungai Akibat Pembuangan Lumpur Sidoarjo Pada Kali Porong

“…Thomas Fiering merupakan nilai rerata, standar deviasi, koefisien korelasi, dan bilangan acak [2]. Metode Thomas Fiering umumnya digunakan dan dianggap sebagai pendekatan stokastik yang khas untuk peramalan dalam hidrologi [3]. Model Thomas Fiering memungkinkan pembangkitan data nilai curah hujan, pendekatan persamaan bangkitan menggunakan persamaan (1).…”

“…Uji T biasanya digunakan untuk menguji sampel berukuran kecil seperti menguji nilai rata-rata dua kelompok sampel, menguji nilai rata-rata terhadap rata-rata populasi, menguji data yang berpasangan, dan menguji koefisien korelasi. Pengujian distribusi T dapat dilakukan dengan persamaan (2) dengan hasil nilai persamaan (2) dibandingkan dengan nilai kritis pesamaan (3).…”