Trends of mean annual river discharges in the Zapadna Morava river basin
| Autor: | Zoran Cvorovic, Marko Langovic, Sanja Manojlovic |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Mann-Kendall test
Atmospheric Science 010504 meteorology & atmospheric sciences Geography Planning and Development classification of the years by water richness Drainage basin lcsh:G1-922 Structural basin 01 natural sciences Education 0502 economics and business Dry season Turning point Combined method 0105 earth and related environmental sciences Hydrology Global and Planetary Change geography geography.geographical_feature_category 05 social sciences Geology 6. Clean water Trend analysis trend Period (geology) Environmental science Species richness wateriness Zapadna Morava lcsh:Geography (General) 050212 sport leisure & tourism |
| Zdroj: | Glasnik Srpskog geografskog društva Glasnik Srpskog Geografskog Društva, Vol 97, Iss 2, Pp 19-45 (2017) |
| Popis: | Zapadna Morava River basin covers a surface of 15850 km2, which is approximately 18% of the territory of the Republic of Serbia. In its basin, 38 active surface stations are registered. The goal of this paper is the trend analysis of the mean annual river discharges in the Zapadna Morava River basin and their noticing in a longer series of time, as well as determining their intensity. Fifty years period of time (1965 – 2014) is taken for a time series. Because there is no empirical data for mean annual discharge values for all stations for the given period, the number of the hydrological stations, which are processed in this paper, is reduced to 21. Mann-Kendall test has been used for noticing the trend, Sen test has been used for estimating the curves inclinations of the linear trend, while Pettitt’s test has been used for determining the turning point of change. Also, classification of the years by water richness has been performed in this paper in order to determine wet and dry periods. For the needs of identification of medium watery, wet and dry years, the combined method has been used on the data examples from representative stations in the basin. Based on the processed data and the obtained results, it has been established that the most rivers in the basin of the Zapadna Morava River have a slightly decreasing trend of the flow values, whereby the change of the trend is not significant. On the most rivers, the change period has begun in the early eighties of the past century. On a large number of profiles, the watery period was appearing in the beginning of eighties, while the dry season is characteristic for the period from 1990 to 1994. Key words : trend, Zapadna Morava, Mann-Kendall test, wateriness, classification of the years by water richness |
| Databáze: | OpenAIRE |
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