Addressing the environmental risk from the mudflow disaster in Sidoarjo

Boby Bagja Pratama,Supriatna Supriatna,H Herdiansyah

doi:10.1051/e3sconf/20187412003

Abstract

This research focuses on disaster mitigation of Sidoarjo Mudflow since 2005 until 2018. This research aims to analyze and mapping mudflow pattern since 2005. It uses Geographical Information System or spatial information as tools to describe and analyze major environmental problems. It examines data Landsat 7 and 8 Imagery between 2005 and 2018 for calculating the area of impact from Sidoarjo Mudflow. It takes further analysis from research which using Landsat Imagery to calculating sedimentation in Mahakam Rivers. Moreover, addressing the environmental risk at Madura Gulf from Sidoarjo Mudflow in the last few years, this research analyzes the impact of mudflow distribution pattern in and social adaptation in retrospective view. This research found that sedimentation fom the mudflow is making more difficult to calculate the impact and composing mitigation plans. To address the environmental risk from the mudflow disaster, explores spatial information regarding changes from Sidoarjo Mudflow to social adaptation, such as adaptation to looking for fishing area and fishing intensity.

Highlights

Sidoarjo Mudflow is one of the major environmental problems in Indonesia[1]
According to document that was published by Audit Lingkungan BPK-RI[1] at the point Forecast of Environmental Impact, flowing to water bodies will causing an environmental risk
Sidoarjo mudflow occurred in May 2006, that Sidoarjo Mudflow has not entered the water bodies so that the sedimentation is still a natural factor

Summary

Introduction

Sidoarjo Mudflow is one of the major environmental problems in Indonesia[1]. Mitigation that has been done by the government was redirecting the mud flows to nearest water bodies. According to document that was published by Audit Lingkungan BPK-RI[1] at the point Forecast of Environmental Impact, flowing to water bodies will causing an environmental risk Such as dust and clay that contained in the mud will take a long time to sediment at the riverbed/seabed. According to the other research, the long-term sedimentation on the water might cause depletion of dissolved oxygen and disturbance in the photosynthesis process It might damage the aquatic biota from clogged gills[3, 6, 9]. EIFAC research findings are: High TSS concentration in water bodies affect aquatic biota. Reducing foods (Affecting phytoplankton productivity) According to numbers of research, mudflow into water bodies and sedimentation from mudflow have spatial variation and temporal variation[12]. According to past research using plotting GPS (Global Positioning System) and GIS (Geographical Information System), the direction of Sidoarjo Mudflow was going to Eastern from Sidoarjo coastline[11]

Data and methods

Result and discussion

Findings

Conclusion