Reliabilitas Rehabilitasi Kolam Pasang pada Jaringan Irigasi Pasang Surut Unit Tabung Anen, Kalimantan Selatan
| Main Author: | Perpustakaan UGM, i-lib |
|---|---|
| Format: | Article NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2005
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/22925/ http://i-lib.ugm.ac.id/jurnal/download.php?dataId=5851 |
Daftar Isi:
- A new tidal irrigation system has been developed by Gadjah Mada University since 1970 to reclaim tidal swampy areas. In the natural condition, due to its bad drainage system, these lands are inundated by rain water and river water. A system of canal that used as a drainage canal during low tide and as irrigation canal during high tide is introduced. Due to the oxidation of acid sulphate soils, there were dispersion of leached acids to the canal. A system of reservoirs (kolam) are provided at the end of the canal to maintain the flow during drainage time and to store theremain acids materials in the canal that is pushed back by reverse flow to the kolam. After 30 years of services, the kolams are covered by sediment and could not function as needed. It was suspected to be the cause of land degradation and reduction of yields. Several farmers ask the rehabilitation of the kolam. A mathematical model is developed to evaluate the reliability of kolam rehabilitation by using HEC-RAS software. The results of simulation shows that the series of tertiary canal and kolam could regulate the flow and could help the canal system to dilute the acid water. Due to its hydro-topography condition (Land Type A), the land and the tertiary canals could act as a huge reservoir that can replace the purpose of kolam. The 126 km length of tertiary canals and 98% land that are inundated during high tide, could increase the cumulative volume of water flow through the canal by 1.671.462 m3, and the rehabilitation of kolam could only contribute about 196.074 m3. Keyword : tidal irrigation system, mathematical model, land reclamation.