基于后Hirakud历史数据的Mahanadi三角洲洪水脆弱区识别

Q2 Social Sciences

International Journal of Water Pub Date : 2019-05-02 DOI:10.1504/IJW.2019.10020977

A. K. Kar, K. Gupta, Joygopal Jena, D. Jena

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引用次数: 0

摘要

Mahanadi盆地有一个大的集水区，面临着水文气候变化。在本研究中，Mahanadi的整个集水区被划分为10 x 10个网格。这些网格被视为完全或部分覆盖流域集水区（至少25%或以上）。对1958-2004年期间每一次洪水的网格降雨量数据进行了分析。在特定洪水发生前，所有网格的日降雨量至少为15天，以确定该特定洪水的脆弱网格。对这些网格进行进一步的统计分析，以找出洪水发生的可能原因。网格上的降雨量没有增加的趋势。还观察到，降雨天数的减少和短时间内降雨量的增加仍然是三角洲形成洪峰的原因。此外，更高的单日最大降雨量也引起了洪水的担忧。

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Identification of flood vulnerable zones in Mahanadi delta based on post-Hirakud historical data

The Mahanadi basin having a large catchment faces hydro-climatic variations. In this study entire catchment of Mahanadi is divided into 10 x 10 grids. Those grids are considered which are covering either fully or partly the basin catchment (at least 25% or more). The gridwise rainfall data are analysed for each flood between 1958-2004. At least 15 days daily rainfall of all the grids prior to a particular flood is considered to find the vulnerable grid for that particular flood. These grids are further analysed statistically to find the possible reasons for occurrence of floods. No increasing trend in rainfall is found over the grids. It is also observed that the decrease in rainy days and more rainfalls in a short period of time remain the reasons for formation of peak floods at the delta. Besides that higher one-day maximum rainfall also makes a concern for floods.

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来源期刊

International Journal of Water Social Sciences-Geography, Planning and Development

CiteScore

0.40

自引率

0.00%

发文量

期刊介绍： The IJW is a fully refereed journal, providing a high profile international outlet for analyses and discussions of all aspects of water, environment and society.