The Use of Retention Pond to Protect the Land from Flooding in Lamasi River Luwu Regency South Sulawesi Indonesia

Scope Database Link: https://scopedatabase.com/documents/00000001/00000-03532.pdf Article Link: https://www.iaeme.com/MasterAdmin/Journal_uploads/IJCIET/VOLUME_10_ISSUE_3/IJCIET_10_03_330.pdf

Manuscript ID : 00000-03532 Source ID : 00000001

International Journal of Civil Engineering and Technology

Volume 10, Issue 3, March 2019, Pages 3295-3306, Page Count - 12

THE USE OF RETENTION POND TO PROTECT THE LAND FROM FLOODING IN LAMASI RIVER LUWU REGENCY SOUTH SULAWESI INDONESIA

Ali Malombassi (1) Pitojo Tri Juwono (2) Muhammad Bisri (3) Ratna Musa (4)

(1) Doctoral Program in Environmental Science, Graduate School , Universitas Brawijaya, Malang, Indonesia. (2) Faculty of Engineering, Universitas Brawijaya, Malang, Indonesia. (3) Faculty of Engineering, Universitas Brawijaya, Malang, Indonesia. (4) Faculty of Engineering, Moslem University, Makassar, Indonesia.

Abstract Luwu Regency, South Sulawesi Province is an area, encountering a lot of flood problems because in particular the rivers in downstream are relatively flat increase sedimentation in the lower reaches of the Lamasi River. In this study one of the rivers in Luwu district, which often experiences flooding every year and has a length of 76.43 km and an area of river basin 432.80 km2 . The flooding caused losses of nine villages in the area surround the Lamasi river. The objective of this study is to determine the optimal capacity of the retention pond and the dimensions of the retention pool used based on the analysis using the Gumel and Nakayasu methods. The type of research based on the data is done by using a quantitative approach by collecting secondary data from the Central Of ice of the Pompengan and Jeneberang River Region in South Sulawesi province. The result showed that the optimal capacity of the retention pond is 1,600,000 m 3 at 9.3 m elevation while the pool volume in the pond at the 10-year return period was 901,131.78 m 3 and the water elevation in the pond is at plus 8.43 m. The dimensions of the retention pond are 3,069 m long and vary from 100 m to 300 m and within an average of 3 m, the height of the embankment is 1.50 m with the width of the embankment 5 m with an optimal reservoir of 1,500,000 m 3 . The age of the retention pool functions effectively because of the sedimentation of 4,481.01 m 3 per year estimated for 133 years.

Author Keywords flood, reservoir, retention pond, river.

Index Keywords Natural disasters, Earthquakes, Landslides, Cyclones, Tornadoes and droughts

Acknowledgement The author would like to thank the Head of the Central Office of the Pompengan and Jeneberang River Region in South Sulawesi Province, the Rector of the Indonesia Moslem University, and Dr. Amin Setyo Leksono, Brawijaya University who assisted in revising the initial manuscript.

ISSN Print: 0976-6308 ISSN Online: 0976-6316 Source Type: Journals Document Type: Journal Article Publication Language: English DOI: 10.34218/IJCIET.10.3.2019.330 Abbreviated Journal Title: IJCIET Access Type: Open Access Publisher Name: IAEME Publication Resource Licence: CC BY-NC Major Subject: Physical Sciences Subject Area classification: Environmental Science Subject area: Waste Management and Disposal Source: SCOPEDATABASE

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