synoptic analysis of masoule catchments floods
نویسندگان
چکیده
the main aim of the current paper is to discuss the important effective variables, particularly synoptic patterns, in creating flood in masoule basin using flood discharge data in komadoul station during 20 year period (1984-2003). to achieve the aim, daily average and instantaneous maximum of discharge in mentioned station were used. data accuracy was done using the data for chomesghal station and technical report from the unexpected events section in the area. in the study period, among the 181 identified flash flood events, 61 events were chosen between years 1996-2003. then, based on the most effective creator parameters, they were classified into two main groups; events which were due to atmospheric instability and synoptic patterns and those occurred as a result of combination rainfall and short length of main channel. about 51% and 49% of destructive floods in the study area belong to the first and second groups, respectively. using the synoptic maps of surface level, 700 and 500 hp, and based on the position of cyclone and anticyclone on basin and their movement over the moisture resources, three specified patterns was distinguished. the cyclonic systems come from mediterranean sea and black sea, while the anti-cyclonic models mainly come from caspian sea and rarely from black sea. the result of the research also showed that mentioned systems, based on their characteristics or establishment period on the basin, have been made flood with different magnitude. among the sampled events, 34, 13, and 14 events were adjusted with one, two and three consecutive day rainfall, respectively. from the temporal point of view, distribution of flood shown that most of them were occurred between sept. and oct., late winter and early spring.
منابع مشابه
The 20 February 2010 Madeira flash-floods: synoptic analysis and extreme rainfall assessment
This study aims to characterise the rainfall exceptionality and the meteorological context of the 20 February 2010 flash-floods in Madeira (Portugal). Daily and hourly precipitation records from the available rain-gauge station networks are evaluated in order to reconstitute the temporal evolution of the rainstorm, as its geographic incidence, contributing to understand the flash-flood dynamics...
متن کاملA synoptic climatology of heavy rain events in the Lake Eyre and Lake Frome catchments
Michael J. Pook*, James S. Risbey, Caroline C. Ummenhofer, Peter R. Briggs and Timothy J. Cohen 1 Commonwealth Scientific and Industrial Research Organisation Oceans and Atmosphere, Hobart, TAS, Australia 2 Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, USA 3 Commonwealth Scientific and Industrial Research Organisation Oceans and Atmosphere, Canberra,...
متن کاملanalysis thermodynamic and synoptic pick floods region mountain (behesht abad basin)
heavy rainfall is the causes of the crisis. in recent years extreme floods have occurred in the behesht abad basin in chahar mahal and bakhtiar province,iran in 2.10.2006 with a moment discharge of 605m3 .this case study lies in the period of 1984-2010 and is selected for synoptic and thermodynamic condition studies. the meteorologically studied variables and thermodynamic charts indicate poten...
متن کاملEnsemble Synoptic Analysis
Synoptic and mesoscale meteorology underwent a revolution in the 1940s and 1950s with the widespread deployment of novel weather observations, such as the radiosonde network and the advent of weather radar. These observations provoked a rapid increase in our understanding of the structure and dynamics of the atmosphere by pioneering analysts such as Fred Sanders. The authors argue that we may b...
متن کاملSynoptic analysis of heavy precipitations of Kurdistan province
The aim of this study is synoptic analysis of heavy precipitations in Kurdistan Province during 1/1/1961 to 31/12/2010(18263days). By using two thresholds of extensively and intensity of precipitation, 107 days have been recognized. In temporal view, the selected days occurrences in wet seasons of year that start from October to June. By applying the principle component analysis on the sea leve...
متن کاملSynoptic Analysis of Early Heat Waves in Northwest of Iran
Early heat waves are extreme events that cause heavy losses in plant and animal life and cause many social and economic problems for communities. The purpose of this study was to identify synoptic patterns and statistical analysis of preterm heat waves in northwestern Iran. To do this, the maximum daily temperature data of March 14th was used for fourteen synoptic stations in the northwest of t...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
پژوهش های جغرافیای طبیعیجلد ۴۱، شماره ۶۸، صفحات ۰-۰
کلمات کلیدی
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023