The Water Qualities of Reservoirs at Mueang District, Phetchabun Province

Abstract

Studying the water quality of reservoirs at Mueang, Phetchabun province was explored of all reservoirs located in Mueang, Phetchabun namely Huai Pla Dang reservoir, Huai Pla Lao reservoir, Huai Yai reservoir, Kong Cha Lieang Rup reservoir and Huai Na reservoir. This research was conducted for 12 months since January to December 2018 and collected water samples quarterly, the results showed that yearly water qualities of five reservoirs were water temperature ranged from 22.75±0.35 to 32±0.00 °C, pH ranged from 8.2±0.00 to 8.9±0.00, DO ranged from 6.35±0.07 to 10.7±0.00 mg/l, BOD ranged from 0.75±0.07 to 15.0±2.82 mg/l, the total coliform bacteria ranged from 1.90±0.14 to 240±5.56 MPN/100ml and the fecal coliform bacterial ranged from 1.80±0.00 to 240±11.32 MPN/100ml. Water quality throughout the year of the five reservoirs were classified into water surface type 2 to 3 in accordance with the water quality standards in surface water sources, according to announcement of national environment board (1994) which it can be used for consumption by pass the processes of usually sterilization and water qualities improving. In addition, it can be used to conserve aquatic animals, fisheries, swimming and water sports including agriculture. However, BOD of water at all reservoirs showed quite high and theirs unsuitability for consumption. In rainy season, stakeholders should avoid water using of Huai Pla Dang reservoir and Huai Pla Lao reservoir because of BOD, total coliform bacteria and fecal coliform bacterial obviously higher than other seasons.