Stream’s regime coefficient in upstream Rokan watershed of Riau Province

Yohanna Lilis Handayani,Siswanto Siswanto,Bambang Sujatmoko,Gumi Oktavia,M Olivia,R Ridwan,I.D Ketut Sudarsana,I.M Agus Ariawan,D Wishart,K Yamamoto,E Saputra,G Pringgana,D Andrio,A Marto,G Wibisono,M Infantri Yekti

doi:10.1051/matecconf/201927604013

Abstract

Flood disaster in Rokan Hulu Regency often occurs every year. High streamflow conditions during rainy season as one of the causes of the flood. Stream’s Regime Coefficient (KRS) is the ratio of maximum and minimum discharge in a watershed that shows the watershed condition. The higher KRS means the worse the watershed condition. The study areas are located in the upstream Rokan watershed. Upstream Rokan watershed with the AWLR (Automatic Water Level Recorder) Lubuk Bendahara and Pasir Pangaraian in Riau Province were picked up as study area of this research. The results show the indicator of stream’s regime coefficient at Lubuk Bendahara AWLR valued 217.45 which placed on poor class and the indicator of stream’s regime coefficient at Pasir Pangaraian AWLR valued 38.25 which placed on good class.

Highlights

Watershed is a land area which is a unit with the river and its tributaries
Erosion, flooding, drought, river siltation are the fact that the hydrological conditions of a watershed are deteriorating and the quality of natural resources is deteriorating in almost all watersheds in Indonesia
The purpose of this study was to determine the condition of the Rokan Kiri Sub-watershed and the Rokan Kanan Sub-watershed based on the KRS value

Summary

Introduction

Watershed is a land area which is a unit with the river and its tributaries. Watershed management means the allocation of natural resources in watersheds including flood prevention, erosion, and resource-related protection. Included in watershed management is identifying the linkages between upstream and downstream areas of a watershed. Erosion, flooding, drought, river siltation are the fact that the hydrological conditions of a watershed are deteriorating and the quality of natural resources is deteriorating in almost all watersheds in Indonesia. The upstream watershed ecosystem is a very important part because it has the function of protecting all parts of the watershed, one of which is a function of water management [3]. Damage to the upper watershed area as water catchment is suspected to be one of the main causes of natural disasters such as floods and erosion [4]

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Conclusion