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1

Statistical methods for trend investigation in hydrological non-seasonal series

100%
Rutkowska A.
Acta Scientiarum Polonorum. Formatio Circumiectus
|
2013
|
tom 12
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nr 4
In the paper some methods for identification of the monotonic deterministic trend in hydrological time series were presented and discussed: the t-test, the Mann-Kendall test with corrections, the Theil-Sen estimator with the test based on bootstrap and the prewhitening method. The tests varied in assumptions on the existence of the serial correlation and the distribution of the variables in the series. Occasionally, when assumptions were not fulfilled, the tests led to contradictory conclusions. As examples, the applications to annual maximum and minimum flows were presented.
2

The assets analysis of agricultural enterprises in the Czech Republic

86%
Zivelova I., Redlichova R.
Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu
|
2007
|
tom 09
|
nr 1
The aim of the paper is to present the findings about the trend in agricultural investments, property structure, especially long-term assets, of the agricultural enterprises between 2000 and 2005 and about the possibilities of investments financing in agriculture. An unfavourable financial situation of agricultural enterprises prevailing up to 2003 resulted in shortage of the capital resources for the agricultural investments needed for the technical and technological changes that would lead to the competitiveness improvement of the Czech agriculture. The economic results of agricultural sector in 2005 and preliminarily also in 2006 stand for the success in keeping positive trends in final economic indicators of Czech agriculture after the accession to the European Union.
3
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Content available

Effects of climate change on rice production at Khulna District, Bangladesh

86%
Hossain N., Saifullah A. S. M., Bhuiyan S. H., Uddin N., Rahman M.
Environment, Earth and Ecology
|
2019
|
tom 3
|
nr 1
4

Variability in the cloud cover of the Karkonosze Mountains over the last century

86%
Dubicka M.
Geographia Polonica
|
2000
|
tom 73
|
nr 2
5

The analysis of trends in purebred dog breeding in 2000-2010 – data from the National Purebred Dog Shows organized by the Polish Kennel Club, Branch in Olsztyn

58%
Strychalski J., Gugolek A.
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego
|
2010
|
tom 06
|
nr 4
6
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Trend analysis of flood peaks in lower reaches of Satluj River, Himachal Pradesh, India

58%
Kumar S., Santosh
International Letters of Natural Sciences
|
2015
|
tom 46
Climate change arising from anthropogenic driven emissions of greenhouse gases has emerged as one of the most important environmental issues in the last two decades. One of the most significant potential consequences of climate change may be alteration in regional hydrological cycle and river flow regimes. Increased temperature is expected to increase the peak flows in snowfed rivers of Himalayas. The changing pattern of regional temperature on flood peaks deserves urgent and systematic attention over a basin which provides an insight view of historical trends. Lower reaches of Satluj River is selected for the present study. Testing the significance of observed trends in flood peaks has received a great attention recently, especially in connection with climate change. The data series available was 48 years (1967-2010). The records were subjected to trend analysis by using both non-parametric (Mann-Kendall test) and parametric (linear regression analysis) procedures. For better understanding of the observed trends, flood peaks were computed into standardised flood peak indices (SFPI). These standardised data series were plotted against time and the linear trends observed were represented graphically. The analysis of flood peaks at different observation stations in lower reaches of Satluj River showed a large variability in the trends and magnitudes. The trend analysis results of flood peaks and gauge heights indicate that the flood peaks at all sites i.e. Rampur, Suni and Kasol show increasing but statistically insignificant trends. The trends in gauge height at all sites are also showing increasing trend but Kasol is statistically significant at 95% confidence level. The fast melting of glaciers, incessant monsoon rainfall and the synchronisation of the discharge peaks are the main causes of river floods. The past flood peaks will help us to observe the frequency of occurrence of floods in certain region and to determine whether the flood peaks in the past have been same with that of the present or whether there is any deviation in the trend in relation to climate change. Such studies will help in designing mitigation and adaptation strategies towards extreme hydrological events.
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