Water quality and Assessment of Trophic State Using Chlorophyll a as Indicator: A Case Study of Upper and Middle Ing River

Abstract

The current research was aimed to study water quality and assess trophic state using chlorophyll a as indicator in the upper and middle Ing River. Water quality surveys were carried out every 2 months during January to December 2017. Data were collected from 10 stations in the middle zone of upper and middle Ing River as well as from branch creek in 10 lines that carry pollution loads from the upper and middle Ing River watershed communities. Data for types of stationary sources that generate routine release of pollutants were collected at 12 water quality sampling stations. The results showed that all sampling sites were shown to standard for surface water quality CLASS 2. Assessment of chlorophyll a trophic state of Ing River was in oligotrophic status and municipality sources were the predominant cause of high level of NH3-N (33.90 mg/l) PO43--P (16.77 mg/l). Total Maximum Daily Loads (TMDL) was emanating discharged from most communities. Nutrient pollution was high during dry season. The Multivariate Analysis (MVA) was used to determine the aquatic environmental factors in response to factor influencing water quality. The results revealed that pH was apparently affected the levels of chlorophyll a. The study showed clearly that the importance of understanding of the impact of seasons affect nutrient loading was met. They are particularly useful in formulating and implementing effectiveness management plans for the conservation of the aquatic environmental monitoring in the area of upper and middle Ing River.