巴基斯坦巴焦尔地区Watalai Khwar引发山洪的范围和因素评估

Fazli Malik, Amir Nawaz Khan, Atta Ur Rahman, Shahid Iqbal, M. Azhar Nawaz
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摘要

本研究旨在确定巴基斯坦开伯尔-普赫图赫瓦省巴焦尔瓦塔莱流域暴发洪水的潜在原因。为了达到研究的主要目的,本研究同时使用了一手和第二手数据。五个最常受洪水影响的村庄被选中进行数据收集。为了调查山洪暴发的人为原因,当地社区不同阶层的代表填写了310份精心设计的问卷。研究发现,33%的受访者认为该流域的强降雨是造成该地区山洪暴发的主要原因。同样,6%的被调查者声称,该地区的山洪暴发是由于春季和夏季的强雷暴造成的。大约33%的受访社区认为,人类的入侵和没有规划的基础设施是Watalai洪泛平原发生山洪暴发的主要原因。同样,8%的样本人口表明,由于人口增加,该地区发生了山洪暴发。然而,除了社区对山洪成因的反应外,管道涵洞和低高度桥梁等其他因素也是研究区域山洪成因的原因。研究区空间影像分析表明,河道角度尖角、低透水山区、陡坡和泥沙负荷的沉积是造成大流量和山洪暴发的主要原因。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Extent and Evaluation of Factors Causing Flash Floods in Watalai Khwar, District Bajaur, Pakistan
This study was designed to identify the potential causes of flash floods in the Watalai watershed District of Bajaur, Khyber Pakhtunkhwa, Pakistan. The study used both primary and secondary data to achieve the study's main objectives. The five most frequently flood-affected villages were selected for the data collection. To investigate the anthropogenic causes of flash floods 310 carefully designed questionnaires were filled by the representatives of different sections of the local community. The study finds that in the opinion of 33% of the respondents’ intense rainfall in the watershed mainly causes flash floods in the area. Similarly6% of the investigated people claim that flash floods in the area are due to heavy thunderstorms in the spring and summer seasons. About 33% of the inquired community is of the view that human encroachment and unplanned infrastructure are the main causes of flash floods in the Watalai floodplain. Likewise, 8% of the sample population reveals that flash floods are caused in the area due to an increase in population. However, in addition to the responses regarding the causes of flash floods from the community, other factors like the piped culverts and low height bridges are also causes of flash floods in the study area. The analysis of the study area's spatial images shows that the water channel's sharp angles, the low permeable mountainous region, steep slopes and the deposition of sediment load were the reason for high flow and flash floods.
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