Executive Summary Pakse Prefeasibiilty Study – Drainage and Sanitation
August 12, 2011
This report covers the flood protection and liquid waste components of the PUEIP. The aim of this report is to provide a description of the key issues in these sectors with potential solutions identified and, where adequate data exists, develop these to pre-feasibility status.
Flooding in Pakse either stems from surface run off from the steep hills around the city during heavy rainfall, or is due to river levels rising during the wet season. This flooding usually occurs when the small streams that drain the city and discharge into the Mekong and Xedon Rivers, back up during high river levels. When both events coincide, flooding can be very problematic. Major flooding has occurred when the river embankments have been overtopped by the Mekong during higher than normal floods. This can happen about once every ten years.