03390nas|a2200433 i 4500 20260818112723.0 041199s1999 th uu m rtt 00| a1eng d .b11765215 AIT Thesis no.EV-99-30 Tiev Visoth Evaluation of environmental capacity of Tonle-sap basin for use as raw water supply for Phnom Penh city, Cambodia Bangkok : Asian Institute of Technology, 1999 112 leaves Thesis ;vno. EV-99-30 A thesis proposal submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development Thesis (M.Sc.) - Asian Institute of Technology, 1999 The Tonle Sap River Basin plays a key role in supplying as raw water to Phnom Penh City, Cambodia. The purposes of this study were: to evaluate water quality characteristics in the Tonle Sap water basin, identify problems of water supply quality and conduct experiments on water hyacinth pond (WHP) systems to improve quality of raw water from the Tonle Sap river. Various aspects of water quality were studied at four locations of the main path of the Tonie Sap River. Raw water, treated water and distributed water from households from four districts were analyzed. Experiments on WHPs were conducted to investigate the treatment efficiencies by changing HRT and varying the percentage of plant harvesting. The results showed that quality of the Tonie Sap water, treated water and distributed water fluctuated with time and exceeded recommended WHO and MRC raw water and drinking water quality standards. For example, the TSS concentrations of raw water from Tonle Sap river were 80-600 mg/L, exceeding TSS the MRC raw water quality standard of 25 mg/L. The WHP experiments found the optimum conditions of WHP to be: HRT of 3 days, plant harvesting at 50% of the pond surface area; the k value was 30.7 m/yr. The use of WHPs to pre-treat the raw water supply could improve the raw water quality to meet the raw water quality standards. Water quality Cambodia Phnom Penh Chongrak Polprasert, Chairperson Ha, Sung Ryong, Co-Chairperson Preeda Pakpian, Examination Committee Trankler, Josef, Examination Committee Swedish International Development Agency (SIDA), Scholarship donor Asian Institute of Technology. Thesis ; no. EV-99-30 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B12096 .b11765215 mnait y 240420 0 991104 m a y 0 mnait mnait mnarc 22 40 20 Barcode : 30050120654776 CREATED : 2014-03-20 RECORD # : i12775216 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160077441 CREATED : 2016-05-23 RECORD # : i12988315 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121074487 CREATED : 2023-03-23 RECORD # : i13440238 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 40947 40947 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-99-30 30050120654776 2026-08-18 11:27:23 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.EV-99-30 30050160077441 2026-08-18 11:27:23 2026-08-18 40 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-99-30 30050121074487 2026-08-18 11:27:23 1 2026-08-18 20