DETERMINATION OF DEOXYGENATION RATE OF URBAN RIVER USING MODIFICATION METHODS FOR CITEPUS RIVER WATER, BANDUNG, INDONESIA

Y. M. Yustiani, M. Nurkanti, F. K. Tarigan, G. Sudarjanto
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引用次数: 1

Abstract

River water quality modeling needs appropriate and suitable coefficients especially in application for specific river like urban river. Aim: This study aims to determine the value of the coefficient with a short term duration and a variable test time span.  Several ways and methods of determining the rate of deoxygenation are developed according to the characteristics of the river and the environment. Modification method was applied in this research in which the test time span was unequal. The river chosen in this study is the Citepus River, Bandung, Indonesia representing an urban river in a tropical country. Methodology and Results: Sampling was carried out in the dry season. The laboratory analysis method used in determining the rate of deoxygenation uses the Slope Method of data from the short term incubation, which is ten days. The results showed that the Thomas Slope method's deoxygenation rate (K1) was 0.095 per day in the upstream segment, 0.917 per day in the middle segment, and 0.180 per day in the downstream segment. While the Ultimate BOD (La) value is 46.95 mg/l in the upstream segment, 38.70 mg/l in the middle segment, and 37.60 mg/l in the downstream segment. Conclusion, significance, and impact of study: The results of this study show that the value of the deoxygenation rate is similar to the theoretical surface water conditions. However, in the upstream segment, there is still a low deoxygenation rate value due to non-optimal activity of microorganisms. This findings will be very useful both in water quality modeling and river management.
用改良法测定城市河流的脱氧率,万隆,印度尼西亚
河流水质建模需要适当和合适的系数,特别是在城市河流等特定河流的应用中。目的:本研究旨在确定短期持续时间和可变测试时间跨度的系数值。根据河流和环境的特点,提出了几种测定脱氧速率的方法和方法。在试验时间跨度不等的情况下,本研究采用了修正方法。本研究选择的河流是印度尼西亚万隆的Citepus河,代表了热带国家的城市河流。方法和结果:在旱季进行抽样。用于确定脱氧速率的实验室分析方法使用短期孵育(10天)数据的斜率法。结果表明,Thomas Slope法的上游段脱氧速率(K1)为0.095 / d,中游段为0.917 / d,下游段为0.180 / d。上游段的最终BOD (La)值为46.95 mg/l,中间段为38.70 mg/l,下游段为37.60 mg/l。结论、意义及影响:本研究结果表明,脱氧速率值与理论地表水条件相似。然而,在上游环节,由于微生物活性不佳,脱氧速率值仍然较低。这一发现将对水质建模和河流管理非常有用。
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