A. Syarifudin, M. S. Imanudin, A. S. Moerwanto, M. Yazid, and F. X. Suryadi

Canal erosion is one of the technical issues in tidal lowland agriculture. It is influenced by water flow in the canal under a designated water network system. This study aims at exploring several aspects related to the erosion at the secondary canal in tidal lowlands of Delta Telang I, Banyuasin District, South Sumatra. A survey was conducted to measure canal profiles related to water flow, observe grain size and sediment transport in secondary canal and its implication on the operation and maintenance of water infrastructures. Results indicate that majority of secondary canals are unstable in relation to water flow. Sediment size in both SPD and SDU canals is categorized as non-cohesive. Operation and maintenance should be directed towards achieving stable canal to fulfil crop water requirement.

Index Terms—Erosion and sedimentation, secondary canal, Opreation and Maintenance