Peak Discharge in Jemelak Subwatershed, Sintang District

IF 0.5 3区数学 Q3 LOGIC

Journal of Symbolic Logic Pub Date : 2020-09-28 DOI:10.23960/JSL38273-282

D. Auliyani, E. Nugrahanto

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引用次数: 3

Abstract

Jemelak Sub Watershed is close to the junction of two big rivers, i.e. , Kapuas and Melawi. Therefore, this location faces environmental issues such as a flood. To avoid its possible damages, information o n peak discharge becomes critical , particularly in calculating the drainage structure. This study was aimed to predict the peak discharge in this area using a rational method. The maximum daily rainfall data from 1998 to 2017 were divided into two periods of 10 years and analyzed. In the first period, maximum rainfall range s from 98.6 to 176.3 mm, while the second period fluctuates from 67 . 6 to 190 mm. Analysis of land cover described that 43.97% of secondary swamp forest s turned into shrubs and swamp shrubs in the first period. Furthermore, about 800.71 ha of secondary swamp forest tuned into 582.80 ha of bare land, 181.04 ha of a plantation, and 36.88 ha of swamp shrubs in the second period. About 95.15% of shrubs w ere also turned into agricultural land mixed with shrubs in the second period. The result showed that the changes in the maximum daily rainfall and land cover simultaneously affected the improvement of the peak discharge by about 2.53% in the first period and 28.30% in the second period. If the peak discharge exceeds the river capacity, then the local flooding will occur along the river border. Keywords: land cover, peak discharge, rainfall, Jemelak

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新塘区杰密拉克小流域的峰值流量

Jemelak Sub Watershed靠近两条大河的交汇处，即Kapuas和Melawi。因此，这个位置面临着洪水等环境问题。为了避免其可能造成的破坏，峰值流量的信息变得至关重要，特别是在计算排水结构时。本研究旨在采用合理的方法预测该地区的峰值流量。将1998 - 2017年的最大日降雨量数据分为两个10年时段进行分析。第一阶段最大降雨量在98.6 ~ 176.3 mm之间，第二阶段最大降雨量在67 mm之间波动。6至190毫米。土地覆被分析表明，43.97%的次生沼泽林在第一阶段转变为灌木和沼泽灌木。第二阶段约有800.71 ha的次生沼泽森林转化为582.80 ha的裸地、181.04 ha的人工林和36.88 ha的沼泽灌木。第二期约有95.15%的灌丛变为灌丛混作农用地。结果表明，最大日降雨量和土地覆被的变化同时影响了第一期和第二期洪峰流量的改善，分别提高了2.53%和28.30%。如果洪峰流量超过了河流的容量，那么沿河边界就会发生局部洪水。关键词:土地覆盖，峰值流量，降雨，热密拉克

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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来源期刊

Journal of Symbolic Logic 数学-数学

CiteScore

1.20

自引率

16.70%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of Symbolic Logic publishes research in mathematical logic and its applications of the highest quality. Papers are expected to exhibit innovation and not merely be minor variations on established work. They should also be of interest to a broad audience. JSL has been, since its establishment in 1936, the leading journal in the world devoted to mathematical logic. Its prestige derives from its longevity and from the standard of submissions -- which, combined with the standards of reviewing, all contribute to the fact that it receives more citations than any other journal in logic.