Journal Article

Evaluation of water quality and dam for sustaining the fish population dynamics

Tiwari, Poonam, Tiwari, Mahidhar Prasad

2022

Overview

Bhagirathi is a Himalayan River, which flows in Uttrakashi district in Uttarakhand state. It is one of the most important streams of the Ganga River. This river is famous for dam construction and fisheries development. The fishes of commercial importance in cold water are Mahaseer, Snow Trout. The fish production depends on the physical, chemical as well as biological qualities of water. In the present paper, water quality evaluation and dam in the sustaining fish population dynamics have been reviewed to make aware the fish culturist and environmentalist about the water quality factors which influence health of a pond and to increase the fish yields to meet the growing demands of present time scenario of the our country. The construction of dams causes many problems. Water quality and discharge of water from the dam wall systems also indirectly affect the fish populations. In this study, we also review some of the important impacts associated with dams and their recommended mitigation measures. There is a negative impact on fish population dynamics, especially for downstream habits due to dams. Water quality is measured like temperature, turbidity, carbon dioxide, pH, alkalinity, hardness, BOD, TDS, Turbidity. The maximum oxygen content of water was recorded in January 13.02 ± 0.166 mg l −1 and minimum 9.4 ± 0.05 mg l −1 in July in site I phase I (before the reservoir dam wall). While in site II and phase I (After the dam), the maximum DO was observed in the month of January of 12.1 mg l −1 and minimum in July of 8.93 mg l −1. This is because water level is minimized in site II almost dried in winter. The CO 2 of the Maneri Bhali phase I -Site I (before dam) was recorded maximum in April 3.10 ± 0.012 mg l −1 . In Maneri Bhali phase I -Site II (After dam), the CO 2 was recorded maximum 3.01 ± 0.003 mg l −1 in the month July. The river of Garhwal Himalaya harbors a rich aquatic diversity, the most common endemic fish species that inhabit this fresh water is the Schizothorax species. The maximum no. of fish were observed in winter and minimum in monsoon. At present, the production of these fishes from the streams is very poor and is not well managed from recreational and conservation point of view. If such is developed properly, it can have revenue potential for our state government. Sports, fisheries, tourism should be promoted.

• Publisher: Springer International Publishing,Springer Nature B.V,SpringerOpen
• Subject: Alkalinity / Animal population / Aquatic Pollution / Biochemical oxygen demand / Carbon dioxide / Cold water / Comparative Law / Construction / Creeks & streams / Dam construction / Dams / Damsites / Earth and Environmental Science / Earth Sciences / Endemic animals / Endemic species / Fish / Fish culture / Fish population dynamics / Fish populations / Fisheries / Fisheries development / Fishery development / Fishing / Fluctuations of water level / Fresh water / Freshwater / Freshwater fish / Harbors / Hydrogeology / Hydropower project / Industrial and Production Engineering / Inland water environment / International & Foreign Law / Mitigation / Nanotechnology / Original Article / Oxygen content / Population dynamics / Population studies / Private International Law / Quality assessment / Rivers / Streams / Tourism / Turbidity / Waste Water Technology / Water discharge / Water hardness / Water Industry/Water Technologies / Water levels / Water Management / Water Pollution Control / Water quality / Water quality measurements / Water quality parameters / Water temperature / Winter