Groundwater Management for Small Islands and Spatial Patterns (Case Study of Banggai Kepulauan Regency)

DOI

10.2991/aer.k.210603.015How to use a DOI?

Keywords

Groundwater, Banggai Islands, Spatial Patterns

Abstract

Banggai Kepulauan (Bangkep) Regency with an area of 21,988.56 km2, 30% of its territory is land, namely Peleng Island and several small islands, while the other 70% is in the form of sea. A small portion of the region experiences drought during the dry season and its geological factors, but in the next few decades water shortages will likely be widespread. Based on geological data, most of the area is in the form of limestone, coral reefs and sandy clay deposits mixed with sand (tuff) so that the aquifer is secondary, the river water flow is not permanent. In Perda No. 1 of 2016 the spatial pattern allocates settlements in coastal areas while investment in oil palm plantations in catchment areas is possible to disrupt water balance. This study aims to determine groundwater reserves and their predicted use for domestic based on the spatial pattern of Banggai Kepulauan Regency. The method used is the analysis of water resources balance based on space patterns until 2032. Groundwater reserves (∆S) are calculated based on the amount of precipitation (P) minus Evapotranspiration (Ep) and surface flow (Q). Predictions of domestic water use are calculated based on the number of population in the nth year with the approach “Pn = Po (1+ r) n. The results showed that until 2032 domestic water needs were still sufficient, where groundwater filling was 10,976,246 m3 / year while usage reached 4,010,494.02 m3/year. This condition can be achieved if the ideal population distribution is evenly distributed throughout the region, but the reality in the planned pattern of population distribution is concentrated in coastal areas. To maintain the continuity of groundwater sources, detailed distribution of population and catchment area and protection of springs need to be focused on spatial patterns. The types of plantation crops need to be reviewed due to regional conditions. Water saving and rainwater utilization through a shelter and processing system are strongly recommended.

Copyright

© 2021, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jaka Suryanta
AU  - Turmudi
AU  - Irmandi Nahib
PY  - 2021
DA  - 2021/06/04
TI  - Groundwater Management for Small Islands and Spatial Patterns (Case Study of Banggai Kepulauan Regency)
BT  - Proceedings of the International Conference on Sustainable Biomass (ICSB 2019)
PB  - Atlantis Press
SP  - 84
EP  - 90
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.210603.015
DO  - 10.2991/aer.k.210603.015
ID  - Suryanta2021
ER  -