一个基于事件的分析极端降雨和南部泰米尔纳德州的历史趋势
Bidare Phalanetra Deepthi1, Kotigaanahalli Nanjundegowda Vishwanth1, Mysore KeshavaRao Harikeerthan1
1Dayananda Sagar Academy of Technology & Management, Bengaluru, 560082, India.
Scientific reports
|December 8, 2025
概括
2023年12月,来自风Michaung的极端降雨导致了泰米尔纳德邦的严重洪水. 分析显示降雨变化和极端事件增加,需要加强沿海地区的洪水管理和气候适应战略.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 气候科学 气候科学
背景情况:
- 洪水是印度经常发生的自然灾害,由气候变化和人类活动加剧.
- 泰米尔纳德邦南部的几个地区 (肯雅库马里,坦卡西,蒂鲁内尔维利,图图库迪) 在2023年12月因迈风而遭受了灾难性的洪水.
- 长期降雨数据 (1901-2023) 表明降雨变化升级,季节性变化,极端事件频率增加,特别是在东北季风期间.
研究的目的:
- 调查2023年12月泰米尔纳德南部洪水的原因和影响.
- 分析该地区的长期降雨趋势和极端事件频率.
- 为脆弱的沿海地区提出积极的洪水管理和气候适应战略.
主要方法:
- 对历史降雨数据 (1901-2023) 的分析,以确定变化,季节性和极端事件的趋势.
- 计算季节性指数 (PCI,PCD,SI) 和评估季风开始退出趋势.
- 使用HAND (High Above Nearest Drainage) 算法进行洪水淹没建模,并与地面真实数据验证.
主要成果:
- 2023年12月17日的降雨量超过了Tirunelveli和Thoothukudi的100年回归周期,以及Kanyakumari和Tenkasi的50年回归周期.
- 洪水泛滥模型划定了150平方公里的受影响区域,主要是在Thamirabarani河流域内.
- 观测到的降雨模式的变化表明,趋势是更多的集中,高强度的降雨事件和漫长的季风季节.
结论:
- 2023年12月的事件是统计学上罕见且在水文上严重的洪水,强调了极端天气事件带来的风险日益增加.
- 积极的洪水管理策略,包括动态洪水绘图,预警系统,可持续的土地利用和绿色基础设施,对图图库迪,蒂鲁内尔维利,坦卡西和肯雅库马里至关重要.
- 长期气候适应措施,如改善降雨预测的气候建模,弹性基础设施开发和社区教育,对于提高准备和减轻未来洪水影响至关重要.
相关概念视频
Precipitation and Co-precipitation
4.0K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
4.0K
Precipitation Processes
4.6K
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
4.6K
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
270
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
270
Responses to Drought and Flooding
11.9K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
11.9K
What is Weather?
19.6K
Overview
19.6K
Precipitation Titration Curve: Analysis
1.7K
The precipitation titration curve demonstrates the change in concentration of one reactant with the volume of titrant added. During the titration of chloride ions with silver nitrate, the precipitation titration curve is divided into three regions: before, at, and after the equivalence point. Before the equivalence point, low redissolution of the sparingly soluble silver chloride precipitate gives a low silver ion concentration. However, in the second region, representing the equivalence point,...
1.7K


