Hydro-climatic characteristics of hill stations of India
Hydro-climatic characteristics of hill stations of India
复制标题
DOI：
10.54302/mausam.v66i1.373
复制
发表时间：
2021-12
期刊：
影响因子：
0.6
通讯作者：
V. Vizaya Bhaskar
中科院分区：
文献类型：
--
作者：
V. Vizaya Bhaskar
本文研究了全国18个山地水文站的水文气候特征。通过对1961-2010年期间18个台站的湿度、干燥度和湿度指数的年际变化研究，得到了1961-2010年期间所有台站水分收支要素的气候变化及其稳定性、正常值和极值。气候变化的年代际频率，ENSO和拉尼娜事件对湿度指数的影响，以及各站水分收支要素的极端是另一个方面的研究。这是适当的，潮湿（洪水）和干旱事件的发生频率和强度的研究在西南季风季节，而不是每年的基础上，75%的年降雨量发生在西南季风季节。也有一些研究认为，西南季风的表现与ENSO和拉尼娜现象有遥相关。通过对西南季风期湿度和干燥度指数的季节变化研究，得到了西南季风期湿（涝）旱事件的发生频率和强度。文中还介绍了研究期间各季节湿度指数的变化趋势以及ENSO和拉尼娜事件对湿度和干燥度指数的影响。提出了湿/干旱事件发生的区域和年代际频率。此外，还列出了所有17个湿润气候丘陵站的总湿润事件发生率、类别和总量，以及它们的沿着趋势。潜在的蒸散量和降水量的计算，每月的基础上，迫使修订Thronthwaite和马瑟水平衡模型，以获得基本的水收支元素，从而其他参数。
Hydro climatic characteristics of 18 hill stations selected from all regions of the country is taken up in the present investigation. Climatic shifts and stability, normal as well as extremities of water budget elements at all the 18 selected stations for the 1961-2010 period are obtained through study of inter annual variation of humidity, aridity and moisture indices. Decadal frequency of climatic shifts, influence of ENSO and La Nina events on moisture index and extremities of water budget elements at individual stations is another aspect that is studied. It is appropriate that frequency of occurrence and intensities of humid (Flood) and drought events are studied during southwest monsoon season rather on annual basis, as 75% of annual rainfall occur during southwest monsoon season. Also several studies concluded that performance of southwest monsoon has teleconnection to the ENSO and La Nina phenomena. Frequency of occurrence and intensities of humid (Flood) and drought events have been obtained through study of inter seasonal variation of humidity and aridity indices during southwest monsoon season. Trend in seasonal humidity index and the influence of ENSO and La Nina events, in the study period, on the humidity and aridity indices is also presented. Regionwise and decadal frequency of occurrence of humid / drought events is brought out. Percentage occurrence of total humid events over all 17 moist climate hill stations put together, category wise as well as total, along with their trend is also brought out. Potential evapotranspiration and precipitation are computed on a monthly basis to force the revised Thronthwaite and Mather water balance model to derive the basic water budget elements and thereby other parameters.