利用印度中部一个邦的趋势分析,确定长期降雨量的变化水平

IF 2.7 4区 环境科学与生态学 Q2 WATER RESOURCES Journal of Water and Climate Change Pub Date : 2023-12-12 DOI:10.2166/wcc.2023.047
K. Sahu, S. Chandniha, Manish Kumar Nema, G. K. Das, Haritha Lekshmi V., Pratibha Wadware
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引用次数: 0

摘要

降雨是调节水文循环、水资源供应和作物生产的关键天气要素。本研究利用 120 年(1901-2020 年)的降雨量数据,对恰蒂斯加尔邦 149 个区块的降雨量在季节和年度时间尺度上的空间和时间变异性进行了研究。研究采用了非参数、Theil 和 Sen 的斜率估算器来识别可能的趋势并确定降雨量的变化。结果显示,恰蒂斯加尔邦的降雨量在年度和季节时间尺度上存在明显的空间变化。在 149 个区块中,有 105 个区块的降雨量呈显著负值。年降雨量在博帕尔帕特南、比贾布尔、乌苏尔、孔塔等少数几个区块呈现出明显的正趋势。季风季节也出现了类似的趋势。研究结果表明,迫切需要制定水资源管理和规划的政策和战略。可以根据该地区的适宜性,确定降雨趋势良好的区块,以加强更多需水作物的种植。研究结果可作为作物规划、政策制定和应急计划编制的宝贵信息。
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Level long-term rainfall variability using trend analysis in a state of central India
Rainfall is the key weather element which regulates the hydrological cycle, availability of water resources and crop production. In this study, spatial and temporal variability of rainfall has been investigated on seasonal and annual time scales of 149 blocks of Chhattisgarh State using 120 years (1901–2020) of rainfall data. Non-parametric, and Theil and Sen's slope estimator were used to identify possible trends and ascertain the variability in the magnitude. The results revealed that there exists a well-marked spatial variability in rainfall over Chhattisgarh in annual and seasonal time scales. Out of 149 blocks a significant negative rainfall was noticed in 105 blocks. Annual rainfall showed a significant positive trend in a few blocks like Bhopalpattnam, Bijapur, Usur, Konta. A similar pattern of trend was noticed in monsoon season. The results of the study demand the urgent need to formulate policies and strategies for water resource management and planning. The blocks which showed the positive rainfall trends can be identified to intensify the cultivation of more water requiring crops based on the suitability to that region. The findings of this study can be used as valuable information for crop planning, policy-making and preparation of contingency plans.
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来源期刊
CiteScore
4.80
自引率
10.70%
发文量
168
审稿时长
>12 weeks
期刊介绍: Journal of Water and Climate Change publishes refereed research and practitioner papers on all aspects of water science, technology, management and innovation in response to climate change, with emphasis on reduction of energy usage.
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