气候变化领域集成服务门户(CCPortal): Long-term trends and spatial variability in rainfall in the southeast region of Bangladesh: implication for sustainable water resources management

CCPortal

DOI	10.1007/s00704-024-04843-8
	Long-term trends and spatial variability in rainfall in the southeast region of Bangladesh: implication for sustainable water resources management
	Nath, Hrithik; Adhikary, Sajal Kumar; Nath, Srijan; Kafy, Abdulla - Al; Islam, Abu Reza Md. Towfiqul; Alsulamy, Saleh; Khedher, Khaled Mohamed; Shohan, Ahmed Ali A.
发表日期	2024
ISSN	0177-798X
EISSN	1434-4483
英文摘要	Accurate and in-depth rainfall studies are crucial for understanding and assessing precipitation events' patterns, intensities, and impacts, enabling effective planning and management of water resources, agriculture, and disaster preparedness. Despite many rainfall studies in Bangladesh at the national and regional scales, study on the spatiotemporal rainfall variability is still rare at the local scale. The current study aims to apply Mann-Kendall (MK), Modified Mann-Kendall (MMK), and Innovative Trend Analysis (ITA) techniques to assess the long-term annual and seasonal rainfall trends and variability over the southeast region of Bangladesh. Monthly rainfall data from ten Bangladesh Meteorological Department climate stations between 1981 and 2022 was used for the analysis on annual and four seasonal scales. The precipitation concentration index results showed significant variations in annual rainfall across the study area, whereas seasonal PCIs were consistent with moderate rainfall. According to standardized rainfall anomaly findings, each station experienced at least one severe to extremely severe drought episode during the 42-year study period. Homogeneity tests revealed significant breakpoints in some rainfall datasets, while 78% were declared homogeneous. MK, MMK, and ITA techniques revealed similar increasing and decreasing trend patterns throughout the study area. Annual rainfall showed an upward trend in the coastal part and a downward trend in the northern part of the study area, with monsoon rainfall exhibiting a similar trend pattern. The ITA technique outperformed the MK and MMK techniques in detecting trends, identifying significant increasing and decreasing trends in 76% (38 out of 50) of the observations, while the MK and MMK techniques detected trends in only 8% and 44% of the total observations, respectively. The outcome of the current study is expected to be helpful for the sustainable planning and management of water resources in the southeast region of Bangladesh.
英文关键词	Mann-Kendall Test; Innovative Trend Analysis; Rainfall; Trend analysis; Sustainable water resources management
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001147686900004
来源期刊	THEORETICAL AND APPLIED CLIMATOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303938
作者单位	Khulna University of Engineering & Technology (KUET); Concordia University - Canada; Rajshahi University of Engineering & Technology (RUET); Daffodil International University; King Khalid University; King Khalid University
推荐引用方式 GB/T 7714	Nath, Hrithik,Adhikary, Sajal Kumar,Nath, Srijan,et al. Long-term trends and spatial variability in rainfall in the southeast region of Bangladesh: implication for sustainable water resources management[J],2024.
APA	Nath, Hrithik.,Adhikary, Sajal Kumar.,Nath, Srijan.,Kafy, Abdulla - Al.,Islam, Abu Reza Md. Towfiqul.,...&Shohan, Ahmed Ali A..(2024).Long-term trends and spatial variability in rainfall in the southeast region of Bangladesh: implication for sustainable water resources management.THEORETICAL AND APPLIED CLIMATOLOGY.
MLA	Nath, Hrithik,et al."Long-term trends and spatial variability in rainfall in the southeast region of Bangladesh: implication for sustainable water resources management".THEORETICAL AND APPLIED CLIMATOLOGY (2024).