Assessment of Water Quality of Vishwamitri River to Explore Environmental Flow Requirements

P. Bhangaonkar, J. Patel
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引用次数: 1

Abstract

Environmental flow is essential for restoring ecological health of a river. Reviewing water quality is integral determinant for exploring Environmental Flow Requirements (EFR) of any river. Vishwamitri is a seasonal river, affected by various Point Sources (PS) and Non-point Sources (NPS) of pollution. This study projects the assessment of various general physico-chemical parameters, heavy metals and biological parameters for water samples collected from various seven sampling stations along the Vishwamitri River. From the analysis it is observed that both BOD and COD values are found more whereas DO values are found less than the desirable limit in downstream water of Vishwamitri in all seasons. The colour of water is mostly observed changing from colourless to slight yellow at downstream stretch of the river in both the premonsoon and monsoon seasons. River near Kalaghoda Bridge in Vadodara City has represented odorous water quality in all seasons. At most of the sampling locations, total coliforms counts were exceeding the limits of standard of class „C‟ during pre-monsoon and monsoon seasons. In monsoon and post-monsoon seasons, most of the sampling stations represented considerably less counts of fecal coliforms. The values of iron and zinc were also observed higher than desirable limit at few sampling stations. Slight changes in the water quality of the river water were observed due to dilution and variation in flow conditions during the monsoon and post-monsoon period. Continuous monitoring of water quality of Vishwamitri and implementation of action plans to control pollution of river is an urgent need.
维什瓦米特里河水质评价探讨环境流量需求
环境流量是恢复河流生态健康的必要条件。评价水质是研究河流环境流量要求的重要决定因素。维什瓦米特里河是一条季节性河流,受到各种点源和非点源污染的影响。本研究计划评估从维什瓦米特里河沿岸七个采样站收集的水样的各种一般物理化学参数、重金属和生物参数。从分析中可以看出,vishamitri下游水体在所有季节中BOD和COD值均高于理想限值,而DO值均低于理想限值。在季风前和季风季节,河流下游的水的颜色通常由无色变为淡黄。瓦多达拉市卡拉戈达桥附近的河流一年四季都有恶臭的水质。在大部分采样点,大肠菌群总数在季风前和季风季节均超过“C”类标准的上限。在季风和季风后季节,大多数采样站的粪便大肠菌群数量明显减少。铁和锌的含量在个别采样点也高于理想限值。在季风期和季风期后,由于水流条件的稀释和变化,观察到河水的水质有轻微的变化。迫切需要持续监测维什瓦米特里的水质,并实施控制河流污染的行动计划。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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