Nutrient and organic pollution profiles of Ping River in Chiang Mai city zone

โพรไฟล์ภาวะมลพิษจากสารอาหารและสารอินทรีย์ของแม่น้ำปิงในเขตเมืองเชียงใหม่

Name: Zin Zin Zaw

ThaSH: Water quality management

Classification :.DDC: 363.7394

ThaSH: Water quality

Abstract: Water quality is an important environmental issue in all around the world. The purpose of this study is to figure out the nutrient and organic pollution of the Ping River while it is passing through the Chiang Mai City. For this purpose, water samples were collected from Ping River at 5 different sampling points which were located starting from upstream of the Chiang Mai City to downstream. Totally 40 water samples were collected during October 2015 to April 2016. pH, water temperature, and electrical conductivity of each water sample were measured on site at the same time of sample collection. BOD, COD, ammonia nitrogen, nitrite+nitrate nitrogen, total Kjeldahl nitrogen, total nitrogen, total phosphate and soluble reactive phosphorus were analyzed for each sample in laboratory. Moreover, the velocity and cross-sectional area of Ping River were measured to express concentration as loading. According to the measurements, cross-sectional area of the Ping River on each sampling site was between 50 m2 and 228 m2; the velocity of the Ping River was between 0.003 m/sec and 0.25 m/sec; and the average flow rate of the Ping River was 7.84 m3 /sec. And pH of Ping River was 7-8; the water temperature of samples in this study was between 17 ºC and36 ºC; and the value of E.C was between 166 µs/cm and 337 µs/cm. The results were described in terms of concentration (mg/L) and loading (kg/day). The resulted BOD values in Ping River were between 2 mg/L and 9 mg/L while BOD loading of Ping River varied from 200 kg/day to 14600 kg/day during the study period. COD concentrations of Ping River varied from 2.652 mg/L to 32.136 mg/L and COD loadings varied from 270 mg/L to 44100 mg/L during the study period. Ammonia concentrations of Ping River varied from 0.001 mg/L to 0.395 mg/L; NOx value was varied from 0.003 mg/L to 0.067 mg/L; Total Kjeldahl nitrogen values in Ping River ranged from 0.019 mg/L to 0.7 mg/L during the study period. Moreover, total nitrogen values in Ping River ranged from 0.042 mg/L to 0.750 mg/L and for loading, total nitrogen showed the values from 3 kg/day to 230 kg/day. Total phosphate varied from 0.0008 mg/L to 0.0150 mg/L while total phosphate loading varied from 0.050 kg/day to 8.700 kg/day during the study period. And the value of SRP varied from 0 to 0.14 mg/L during the study period. The results of the study serve updated data of water quality in Ping River which can help for establishing river management plan in the future. The results of the study give an understanding on non-point source pollution in the rivers.

Chiang Mai University Library

Address: Chiang Mai

Email: cmulibref@cmu.ac.th

Name: Patiroop Pholchan

Role: Chairman

Name: Vililuck Kijjanapanich

Role: Member

Name: Pharkphum Rakruam

Role: Member

Name: Noppadol Kongsricharoern

Role: Member

Created: 2016

Modified: 2020-01-07

Issued: 2020-01-07

วิทยานิพนธ์/Thesis

application/pdf

CallNumber: Th/N 363.7394 Z77N 2016

eng

Spatial: Thailand (Northern)

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Environmental Engineering

Grantor: Chiang Mai University

©copyrights Chiang Mai University

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