Temat: Rainfall - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Rainfall-Induced Landslide Thresholds Development by Considering Different Rainfall Parameters: A Review
Autorzy:: Mansor Maturidi, Abdul Muaz Abu
Kasim, Norhidayu
Abu Taib, Kamaruddin
Wan Azahar, Wan Nur Aifa
Powiązania:: https://bibliotekanauki.pl/articles/2027967.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: rainfall threshold
landslide
rainfall parameter
empirical
correlation
Opis:: This paper reviews the development of landslide thresholds from the perspective of rainfall and climate patterns. For certain, geology, morphology, lithology, etc., contribute to the initiation of the mass movement. However, the role of rainfall as the triggering mechanism of the landslide is vital as well. It has been proven by many researchers from various studies worldwide that have proposed the rainfall thresholds by utilising different rainfall parameters. The outcome of their studies is interesting, since different regions have diversified patterns of rainfall that produce a variety of threshold models. Therefore, from various published papers on rainfall thresholds, this paper studied the variety of rainfall parameters that have been utilised in establishing the rainfall threshold for landslide prediction. Instead of providing a better understanding regarding the application, this review aimed to cultivate the following study for deriving rigorous parameters for the purpose of sustainable findings.
Źródło:: Journal of Ecological Engineering; 2021, 22, 10; 85-97
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Rainfall Variability and Drought Occurrences in the Batticaloa District, Sri Lanka
Autorzy:: Rajendram, K.
Powiązania:: https://bibliotekanauki.pl/articles/1839767.pdf
Data publikacji:: 2021
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Rainfall Variability
Strandred Deviation
Drought Occurrence
Rainfall Trend
Opis:: Due to recent climate changes and monsoon variability, the amount, pattern, and intensity of rainfall are significantly changing in many Asian countries. This paper attempts to study the annual and seasonal rainfall patterns and their variability, and the occurrence of droughts. Monthly rainfall data have been collected from the Department of Meteorology, Colombo, from 1871-2020 for Batticaloa station. The Standard Deviation, Coefficient of Variation least-square trend had computed for annual and seasonal rainfall to study the rainfall variability as whole and different epochs. To study the drought scenario Standardized Precipitation Index had computed, and then the drought was categorized based on the SPI criteria, and the drought severity had distinguished. Spatial rainfall distribution maps had prepared using Arc GIS 10.4 software. The Standard Deviation and the Coefficient of annual rainfall variation are 423.9 and 24.8%, respectively. The epochal variability results reveal that the variability of rainfall is higher in 1961-1990 (CV: 28.9%), which indicates the low dependability, while variability is lower in the epochs of 1931-1960 (CV: 17.7%) and 1871-1900 and (19.6%) respectively. The long-term rainfall trend (1871-2020) results reveal the increasing trend and its r2 = 0.0271. However, only the epoch 1961-1990 shows a downward trend with r2 = 0.2398. The rainfall anomaly results reveal the extreme drought had occurred in 1968 and 1889. The severe droughts had occurred in 1998, 1983, 1981, 1980, 1909, and 1890. Out of 150 years of data periods, 25 years had been identified as drought years. The probability of drought occurrence is P = 0.167. Terefore once in five to six years, drought could have occurred.
Źródło:: World News of Natural Sciences; 2021, 39; 30-45
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Characteristics of Measured Rainfall Rate at Ogbomoso, Nigeria for Microwave Applications
Autorzy:: Semire, F. A.
Raji, T. I.
Powiązania:: https://bibliotekanauki.pl/articles/309068.pdf
Data publikacji:: 2011
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: characteristics
Ogbomoso
rainfall
Opis:: Characteristics of rainfall rate useful in the estimation of attenuation due to rain are presented. Rain data collected at Ogbomoso between January-October, 2009 were used in the analysis. Result shows that power law relationship exists between the equiprobable rain rates of two different integration times. The value of conversion factor CE and CR obtained for Ogbomoso are 0.28(60) and 0.64(90) respectively. Our result then shows that different conversion factor is required for different location even within the same climatic region.
Źródło:: Journal of Telecommunications and Information Technology; 2011, 2; 85-89
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Impact of rainfall trends on flood in Agnéby watershed
Autorzy:: Konin, N’Da Jean Claude
N’go, Yao Alexis
Soro, Gneneyougo Emile
Goula, Bi Tié Albert
Powiązania:: https://bibliotekanauki.pl/articles/2073726.pdf
Data publikacji:: 2022
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: Agnéby watershed
flood
hydro-rainfall hazard
Ivory Coast
rainfall trend
Opis:: The aim of this study is to analyse the spatio-temporal evolution of hydro-rainfall variables in the Agnéby watershed in a disturbed climatic context. Rainfall data from the stations of Arrah, Bongouanou, M’Batto, Akoupé, Céchi, Agboville, Adzopé, Sikensi, Abidjan Airport and Dabou as well as hydrometric data from the stations of Agboville, Offoliguié, M’Bessé and Guessiguié were used. The methodological approach is based on the application of independence and trend tests and spatio-temporal analysis of daily rainfall maxima, duration of consecutive rainfall events, number of rainfall events above a threshold and daily flow maxima. The hypothesis of independence justified the relevance of the choice of variables. The trend test showed the dynamic upward evolution of extreme rainfall and the decrease in the duration of consecutive rainy episodes, in the number of rainy episodes and in the flows feeding the main watercourse. Moreover, spatial analysis of daily maximum rainfall amounts above 120 mm, consecutive maximum rainfall amounts above 160 mm and Gumbel rainfall amounts above 190 mm indicated heavy rainfall in the southern part of the watershed. However, a decrease in rainfall is recorded in the areas covered by the stations of Arrah, Bongouanou, M’Batto, Ce chi and Akoupé. An increase in the flood flow calculated from the Generalized Extreme Value (GEV) between 76.60 m3∙s-1 and 225.70 m3∙s-1 is presented in the main river. The spatio-temporal variation in annual rainfall heights showed a high rainfall in the southern part of the watershed with a decrease in rainfall over the decades (1976-1985 and 1996-2005) followed by an increase over the decades (1986-1995 and 2006-2015). Despite the general decrease in rainfall, extreme rainfall has become frequent, causing flooding in the watershed.
Źródło:: Journal of Water and Land Development; 2022, 52; 9--20
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Spatial variability study of rainfall in Cartagena de Indias, Colombia
Autorzy:: Mouthon-Bello, Javier A.
Quiñones-Bolaños, Edgar
Ortiz-Corrales, Jairo E.
Mouthon-Barraza, Natalia
Hernández-Fuentes, Maria D.J.
Caraballo-Meza, Andrea C.
Powiązania:: https://bibliotekanauki.pl/articles/2174346.pdf
Data publikacji:: 2022
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: coastal city
rainfall duration
rainfall intensity
spatial correlation
spatial variability
Opis:: Precipitation is a component of the hydrological cycle, knowing its spatial distribution is vital for the management of hydrographic basins, the territory and the development of fundamental activities for society. That is why the present study shows the spatial variability of rainfall in Cartagena de Indias city with a network of rain gauges, made up of nine pieces of equipment, separated from each other by 0.9-27 km. After a year of recording (2019), using historical series of data, it was found that the maximum rainfall occurs in the trimester between September and November, with interpolated maps made by the Ordinary Kriging (OK) method it was found that the maximum rainfall is focused on the north, centre and west of the territory, instead, the maximum intensities are presented in the centre and west, the minimums for both variables are presented to the east and south. The 70 and 90% of the rain events have a duration of less than 30 min and 1 h, respectively. Three-parameter exponential function was fitted to the paired correlation distances, and presented correlations lower than 0.8, 0.5 and 0.2 from distances of 1, 3 and 7 km, respectively, in 30 min rain integration. It was also found that with a pluviometric network conformed by at least six pieces of equipment and separated by a 5 km distance from each other in the urban area, a correlation of 0.5 and compliance with the WMO recommendations would be obtained.
Źródło:: Journal of Water and Land Development; 2022, 55; 138--149
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Wstępne rezultaty monitoringu warunków opadowych na terenie miasta Bydgoszczy w latach 2013–2014
The preliminary results of monitoring in terms rainwater in 2013–2014 in the city of Bydgoszcz
Autorzy:: Pasela, R.
Bohuszewicz, G.
Milik, J.
Budzińska, K.
Berleć, K.
Stachowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/399758.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: opad deszczu
natężenie deszczu
deszczomierz
Bydgoszcz
rainfall
rainfall intensity
rain gauge
Opis:: W artykule przedstawiono wstępne wyniki analiz rozkładu wysokości, intensywności i natężenia opadu deszczu na terenie miasta Bydgoszczy, na podstawie pomiarów sieci pluwiometrycznej eksploatowanej przez Miejskie Wodociągi i Kanalizacje w Bydgoszczy. System ten składa się z sześciu deszczomierzy korytkowych typu TPG-036-H24 firmy A-STER, wyposażonych w elektroniczny system zapisu danych z ich transmisją w technologii GPRS do serwera centralnego. Zapis wyników pomiaru wysokości opadów odbywa się w interwałach 2-minutowych z dokładnością do 0,1 mm. Poza tym analizie poddano ekstremalne wysokości i natężania opadów zarejestrowanych w badanym okresie, które zostały zaprezentowane w postaci tabel i wykresów. Pomiary natężenia i wysokości opadu prowadzone przy wykorzystaniu odpowiednio gęstej sieci pluwiometrycznej dają możliwość uzyskania wartościowych rezultatów, niezbędnych w analizie funkcjonowania miejskich systemów kanalizacyjnych.
The paper shows the results of analysis distribution of the amount and rainfall intensity in Bydgoszcz based on network measurements of rain, which is operated by the Municipal Water Supply and sewers in Bydgoszcz. The system consists of six rain-gauges type TPG-036-H24 by A-STER, which are equipped with electronic data recording system with GPRS transmission to a central server. A record of the amount of rainfall measurement results is carried out in 2-minute intervals with an accuracy of 0.1 millimeters. The extreme highs and the intensity of rainfall registered in the audited period was analyzed. The results were presented in a form of tables and graphs. The intensity measurements and the amount of rainfall were used by a dense network of rainwater, which allows you to get valuable results, essential in the analysis of the functioning of municipal sewer system.
Źródło:: Inżynieria Ekologiczna; 2015, 45; 176-182
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: An empirical model of rainfall intensity as a function of rainfall duration and probability of occurrence
Autorzy:: Harisuseno, Donny
Prasetyorini, Linda
Fidari, Jadfan S.
Chandrasasi, Dian
Powiązania:: https://bibliotekanauki.pl/articles/2203546.pdf
Data publikacji:: 2023
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: empirical model
probability of occurrence
rainfall duration
rainfall intensity
recurrence interval
Opis:: Rainfall is one of the main components of the hydrologic cycle; thus, the availability of accurate rainfall data is fundamental for designing and operating water resources systems and infrastructure. This study aims to develop an empirical model of rainfall intensity (It,p) as a function of its probability (p) and duration (t). In 1999-2020, data on the hourly duration of rainfall were collected from automatic rainfall recorder (ARR) gauges. The empirical model has been developed using a statistical approach based on duration (t) and probability (p), and subsequently they have been validated with those obtained from ARR data. The resulting model demonstrates good performance compared with other empirical formulas (Sherman and Ishiguro) as indicated by the percent bias (PBIAS) values (2.35-3.17), ratio of the RMSE (root mean square error) between simulated and observed values to the standard deviation of the observations (RSR, 0.028-0.031), Nash-Sutcliffe efficiency (NSE, 0.905-0.996), and index of agreement (d, 0.96-0.98) which classified in the rating of “very good” in model performance. The reliability of the estimated intensity based on the empirical model shows a tendency to decrease as duration (t) increases, and a good accuracy mainly for the rainfall intensity for shorter periods (1-, 2-, and 3-hours), whereas low accuracy for long rainfall periods. The study found that the empirical model exhibits a reliable estimate for rainfall intensity with small recurrence intervals (Tr) 2-, 5-, 10-, and a 20-year interval and for a shorter duration (t). Validation results confirm that the rainfall intensity model shows good performance; thus, it could be used as a reliable instrument to estimate rainfall intensity in the study area.
Źródło:: Journal of Water and Land Development; 2023, 56; 182--193
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Dynamika zmian sumy i struktury opadów w Wielkopolsce w latach 1981–2020
The dynamics of changes in the sum and structure of atmospheric precipitation in Wielkopolska in 1981–2020
Autorzy:: Walkowska, Anita
Półrolniczak, Marek
Kolendowicz, Leszek
Powiązania:: https://bibliotekanauki.pl/articles/43348607.pdf
Data publikacji:: 2022
Wydawca:: Poznańskie Towarzystwo Przyjaciół Nauk
Tematy:: precipitation
rainfall
snowfall
Wielkopolska
Opis:: The study analyzes the temporal and spatial variability of atmospheric precipitation and the impact of global climate changes on precipitation in Wielkopolska. The study was based on data provided by the IMGW-PIB and collected from 5 synoptic stations located in central Poland. The average multiannual sums of precipitation, the average number of days with precipitation in total and the particular types of precipitation in 1981–2020 were calculated, and their spatial distribution presented. Moreover, seasonal precipitation totals and statistics for days with precipitation were also calculated, and trends of individual pluviometric characteristics presented. The average annual rainfall was 523 mm, and the average annual rainfall frequency was 163 days. Days with rainfall were more frequent than days with snow (35 days). Over the course of many years, there was an apparent decrease in days with snowfall (-6.5 per decade) and an increase in the number of rainy days (4.3 per decade). Annual precipitation totals show no significant long-term changes.
Źródło:: Badania Fizjograficzne Seria A - Geografia Fizyczna; 2022, 13 (73); 207-226
2081-6014
Pojawia się w:: Badania Fizjograficzne Seria A - Geografia Fizyczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Estimation of plant water requirements during sequences of days without precipitation in 2011-2015
Autorzy:: Wójcik, K.
Treder, W.
Zbudniewek, A.
Powiązania:: https://bibliotekanauki.pl/articles/101013.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:: rainfall
evapotranspiration
growing season
Opis:: This paper presents data on daily precipitation totals from six meteorological stations and the climatic water balance for the stations located throughout Poland in 2011-2015. The following sequences of days without precipitation were distinguished: from 11 to 15 days, from 16 to 20 days, and of more than 20 days. The number of precipitation-free sequences during the growing season in 2011-2015 was highly variable. Over the studied period, there were from 1.0 rainless sequence in Wtelno to 2.4 such sequences in Gołębiów per one growing season. The most frequently occurring were sequences of 11-15 days, while those of 16-20 days were less frequent. In the years under analysis, all of the different sequences occurred most frequently in July, and the least frequently in April. The highest numbers of sequences without precipitation were recorded in the south-east of Poland (Zakalniki, Gołębiów).
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2017, III/2; 1187-1200
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Estimation of plant water requirements during sequences of days without precipitation in 2011-2015
Autorzy:: Wójcik, K.
Treder, W.
Zbudniewek, A.
Powiązania:: https://bibliotekanauki.pl/articles/101157.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:: rainfall
evapotranspiration
growing season
Opis:: This paper presents data on daily precipitation totals from six meteorological stations and the climatic water balance for the stations located throughout Poland in 2011-2015. The following sequences of days without precipitation were distinguished: from 11 to 15 days, from 16 to 20 days, and of more than 20 days. The number of precipitation-free sequences during the growing season in 2011-2015 was highly variable. Over the studied period, there were from 1.0 rainless sequence in Wtelno to 2.4 such sequences in Gołębiów per one growing season. The most frequently occurring were sequences of 11-15 days, while those of 16-20 days were less frequent. In the years under analysis, all of the different sequences occurred most frequently in July, and the least frequently in April. The highest numbers of sequences without precipitation were recorded in the south-east of Poland (Zakalniki, Gołębiów).
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2017, II/1; 611-624
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Flow Rate Determination as a Function of Rainfall for the Ungauged Suhareka River
Autorzy:: Kusari, Laura
Osmanaj, Lavdim
Shehu, Hana
Bungu, Samir
Powiązania:: https://bibliotekanauki.pl/articles/2086389.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: catchment area
regression coefficient
CN parameter
rainfall intensity
flow curve
rainfall
flood
Opis:: For ungauged rivers, when there are no hydrological measurements and there is a lack of data on perennial flow rates, the latter one to be determined based on other hydrological data. The river Suhareka catchment represents a similar case. Since there is no data on Suhareka’s flow rates, the authors of this study aimed for the flow rate determination based on rainfall measurements. From the available data on annual precipitation (monthly sums) provided by the Kosovo Hydrometeorological Institute for the Suhareka hydrometric station, the observed monthly rainfall data for 30 years were analysed. Those gaps were initially filled by connecting the hydrometric station in Suhareka with those of Prishtina, Prizren and Ferizaj, and as a result a fairly good fit was ensured. Moreover, the intensity-duration-frequency curves were formed using the expression of Sokolovsky, as a mathematical model of the dependence I (T, P). For a transformation of rainfall into flow, the American method SCS was used. As a result, the equation for the Suhareka River basin was derived, which enabled the determination of maximum inflows, for different return periods. The results obtained through this paper, indicates that even for ungauged river basins the peak flows can be determined from available rainfall data.
Źródło:: Journal of Ecological Engineering; 2022, 23, 4; 110--121
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Comparison of water needs of true millet in the region of Bydgoszcz and Wroclaw
Autorzy:: Rolbiecki, S.
Chmura, K.
Powiązania:: https://bibliotekanauki.pl/articles/61162.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:: rainfall
water need
millet
Bydgoszcz town
Wroclaw city
water deficit
rainfall deficiency
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2015, III/2
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Influence of Selected Factors on Erodibility in Catchment Scale on the Basis of Field Investigation
Autorzy:: Hejduk, L.
Hejduk, A.
Baryła, A.
Hewelke, E.
Powiązania:: https://bibliotekanauki.pl/articles/124503.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: erodibility
catchment scale
rainfall simulation
Opis:: Drying of soil surface can affect the soil water repellency and reduce the infiltration, it may have impact on runoff and erosion. The aim of the research was to determine the effect of soil surface drying on its repellency and erosion, and the dependence of these values from the land use on the changing weather conditions background during the year. The research was conducted on Zagożdżonka river catchment, six times during the period of July 2014-September 2015, at five measuring points characterized by different land use. The irrigation of soil was carried out using rainfall simulator made by Eijkelkamp company. The intensity of the rain during the first 3 minutes of precipitation was 6 mm / min, the kinetic energy of rain was 72 J·m^-2. The surface runoff was collected into containers placed in the bottom of the rainfall simulator. Water Drop Penetration Time test was used to determine soil surface wettability. WET-2 probe was used to measure the moisture and soil temperature. Sediment concentration in the effluent was determined by weight method on filters. Variability of soil wettability was observed in different dates of measurements. Increasing repellency was recorded during the dry periods. The highest class of repellency was found in the forest and wild meadow areas. There was no direct correlation between the soil moisture, soil temperature and runoff. Both, sediment concentrations and sediment grain size, varied in the collected samples, depending on measurement time. The highest sediment concentrations were found in runoff from agricultural land use.
Źródło:: Journal of Ecological Engineering; 2017, 18, 1; 256-267
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Status prawny wód opadowych i roztopowych
Legal status of rainwater and snowmelt
Autorzy:: Krzyż, Paweł Bartłomiej
Powiązania:: https://bibliotekanauki.pl/articles/46606713.pdf
Data publikacji:: 2023
Wydawca:: Wydawnictwo Uniwersytetu Śląskiego
Tematy:: water
rainfall
meltwater
property
use
Opis:: This article is a comprehensive analysis of the legal status of rainwater and snowmelt. The study will attempt to distinguish these waters in an objective way, identify their specific legal context and, finally, establish their civil law status. Incidentally, the issues related to the acquisition of ownership of rainwater and snowmelt by property owners, treatment and use of these waters.
Źródło:: Prawne Problemy Górnictwa i Ochrony Środowiska; 2023, 1; 1-20
2451-3431
Pojawia się w:: Prawne Problemy Górnictwa i Ochrony Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Rainfall Variability in the wet-dry seasons. An analysis in Batticaloa District, Sri Lanka
Autorzy:: Mathanraj, S.
Kaleel, M. I. M.
Powiązania:: https://bibliotekanauki.pl/articles/1118352.pdf
Data publikacji:: 2017
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Flood
Meteorology
Rainfall variability
Wet-dry
Opis:: Rainfall is of primary importance to both the physical and cultural landscape of any region. The objective of this study is to find the trends for rainfall variability on climate change in Batticaloa District of Sri Lanka, by analyzing 146 years of monthly data of rainfall received during the period 1869-2014 from the meteorological station of the Department of Meteorology. Some studies attribute extreme events to rainfall variability due to climate change induced by global warming. However, there is a dearth of climatological studies addressing the trends in rainfall over Sri Lanka in support of such attribution. In our study, statistical analysis such as linear and standard deviation for 3 year, 5 year, 11 year and 21 year periods were utilized to examine periodic rainfall changes in both annual and seasonal contexts. The study finds that the 3, 5 year moving average shows high drier seasons, but the 11, 21 years moving average show higher wet seasons during the period of study. The changes of rainfall are known to have led to disasters such as flood and drought. Annual rainfall varies from 864 mm to 3081 mm, the distribution of which has sight variation throughout the district.
Źródło:: World News of Natural Sciences; 2017, 9; 71-78
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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