Wyniki wyszukiwania - BazTech

1

Extreme precipitation indices trend assessment over Thrace region, Turkey

Oruc Sertac, Yalcin Emrah

Acta Geophysica

|

2021

|

Vol. 69, no. 1

307--321

EN

The frequency and the severity of extreme weather events are increasing globally and will continue to do so in the coming decades as a consequence of our changing climate. Understanding the characteristics of these events is crucial due to their signifcant negative impacts on social, physical and economic environments. In this study, 14 extreme rainfall indices are determined and examined in terms of trends and statistical characteristics for the four meteorological stations located in the Thrace region of Turkey, namely Edirne, Tekirdag, Kirklareli and Sariyer (Istanbul). The results indicate that annual total precipitation has an increasing trend for the Kirklareli and Sariyer stations (z=1.730 and z=2.127) and a decreasing trend for the Edirne and Tekirdag stations (z=− 0.368 and z=− 0.401). However, the precipitation intensity indices (SDII) of all stations show increasing trends that are statistically signifcant for the Edirne and Kirklareli stations. The Kirklareli station tends to have more days with heavy, very heavy and extremely heavy rainfall events (z=2.241, z=2.076 and z=1.684, respectively). It is also anticipated that maximum amount of rainfalls in daily and consecutive fve- and ten-day time scales will probably increase at all stations. Moreover, rainfall from very wet days and extremely wet days and fraction of total wet day rainfall that comes from very wet days and extremely wet days indices also show increasing trend tendencies for all stations. The remarkable point is the decreasing total precipitation trend at the Edirne and Tekirdag stations, contrary to the Kirklareli and Sariyer stations, which indicates that the annual total precipitation does not necessarily depend on extreme precipitation for the analyzed period.

2

Modelling spatial variation of extreme precipitation over Ho Chi Minh City under nonstationary conditio

Binh Le Thi Hoa, Agilan V., Umamahesh N. V., Rathnam E. V.

Acta Geophysica

|

2019

|

Vol. 67, no. 3

849--861

EN

Understanding the magnitude and spatial variation of extreme rainfall events are required for decision making and adaptation strategies for flood risk. In Ho Chi Minh City (HCMC), heavy rainfall, which is considered as a main cause of floods, witnessed an increase in frequency and magnitude in last few decades. Although nonstationarity in extreme rainfall has been proved in many places of the world, research into nonstationarity feature in extreme rainfall in HCMC has not been paid attention thoroughly. In this study, the spatial variation of extreme precipitation over Ho Chi Minh City is modelled under nonstationary condition. The generalized extreme value (GEV) distribution with location made a nonlinear function of time is applied to annual maximum daily rainfall. The study results show that the nonstationary GEV model is found to be superior in capturing extreme precipitation events when compared to the stationary GEV model. The extreme rainfall estimates under the stationary condition are lower than those under the nonstationary condition in most stations. Besides, the spatial variation of extreme rainfall under nonstationary condition shows a significant difference in extreme estimates between the periods of 1980–1984 and 2010–2014 in study area.

3

Mean annual precipitation in a mountain river catchment area in the period 1984-2012 (the case of Kamienica river)

Cupak A., Górka A., Michalec B., Wałęga A.

Geomatics, Landmanagement and Landscape

|

2016

|

no. 2

31--40

EN

The aim of the study is to evaluate the mean annual precipitation in the mountain river catchment area, in the period between 1984-2012. Data on daily rainfall totals was obtained from IMGW PIB in Warsaw, and it came from two weather stations: one in Nowy Sącz, and the other in Krynica. It has been demonstrated that during the multi-year period covered by the study, there were variations in terms of precipitation levels; the year 1987 should be considered e¬tremely dry, while 2010, extremely wet - in the latter year, extreme rainfall was noted. In the analysed multi-year period, within the total annual precipitation, rain dominated during the first half year, which undoubtedly affects the hydrological regime of the Kamienica river.

PL

Celem pracy jest ocena kształtowania się charakterystyk opadu na obszarze górskiej rzeki Kamienicy w wieloleciu 1984-2012. Dane dotyczące sum dobowych opadów pozyskano z IMGW PIB w Warszawie i pochodziły z dwóch stacji opadowych: Nowy Sącz i Krynica. Wykazano, że w badanym wieloleciu występowały zróżnicowane lata pod względem wilgotności; za szczególnie suchy należy uznać 1987 rok, a wilgotny to 2010 rok, gdyż w tym roku występowała największa liczba opadów ekstremalnych. W badanym wieloleciu w sumie rocznej opadów dominowały opady z półrocza letniego, co niewątpliwie wpływa na reżim hydrologiczny rzeki Kamienicy.

4

Odniesienie wyroku Trybunału Europejskiego do niemieckiej praktyki podczyszczania ścieków ogólnospławnych zrzucanych do odbiornika. Opinia grupy roboczej DWA ES-2.1

Schmitt T. G.

Technologia Wody

|

2014

|

Nr 4 (36)

58--63

PL

Grupa robocza DWA ES - 2.1 „Systemowe wymogi i zasady” wydala opinię dotyczącą znaczenia wyroku Trybunału Europejskiego z dn. 18 października 2012 r. dla oczyszczania ścieków ogólnospławnych w Niemczech. Dotyczy to sprawy C-301-10: Komisja Europejska przeciw Zjednoczonemu Królestwu Wielkiej Brytanii i Irlandii o naruszeniu warunków umowy państwa członkowskiego - oddziaływanie na środowisko - oczyszczanie ścieków komunalnych - Dyrektywa 91/271/EWG/ art. 3, 4 i 10 - Załącznik 1 część A i B.

EN

The DWA Working Group ES-2.1 “System-related requirements and principles” released a statement on the relevance of the Judgement of the European Court of Justice (First Chamber) of 2012 October 18 for the practice of the treatment of combined wastewater in Germany. With this, one is concerned with Case C-301-10: European Commission versus the United Kingdom of Great Britain and Northern Ireland: “Failure of a Member State to fulfil obligations - Pollution and nuisance - Urban wastewater treatment - Directive 91/271/EEC - Articles 3, 4 and 10 - Annex 1(A) and (B)”.