{"title":"Multi-annual variability of global solar radiation in the agricultural part of Lower Silesia (SW Poland) and its relationship to the North Atlantic Oscillation","authors":"K. Bryś, Tadeusz Bryś","doi":"10.26491/MHWM/103461","DOIUrl":"https://doi.org/10.26491/MHWM/103461","url":null,"abstract":"In this paper, the long-term variability of global solar radiation in the agricultural area of Lower Silesia is analyzed based on a 56-year long (1961-2016) measurement series recorded at the Agroand Hydro-meteorological Wrocław-Swojec Observatory (SW Poland). Yearly and monthly global radiation sums with their extreme and mean values were compared with radiation data from Warsaw (Central Poland) and Potsdam (East Germany). The dynamics of variability between consecutive months, seasons and years was also taken into account. The conducted positive trends show a significant increase in the investigated global radiation sums for Lower Silesia and also for Central Poland and the eastern part of Germany. The trends are strongly related to long-term macro-circulation changes in the North Hemisphere, particularly with the phases and sub-phases of the North Atlantic Oscillation (NAO). The relations between the investigated values of global solar radiation and these macro-circulation patterns are very complicated and they very often have an asynchronous character. The first, juvenile stage of the NAO positive phase (the 1970s and 1980s), when annual sums of global solar radiation in Wrocław-Swojec reached only the average level of about 3 700 MJ∙m and warm half-year about 2 800 MJ∙m respectively, was cloudy and rainy. This period was distinctly different than the advanced stage of one (the 1990’s and later years) with bigger sunshine duration and smaller annual precipitation, when the adequate radiation sums amount to 3 900-4 000 MJ∙m and 3 000-3 100 MJ∙m respectively.","PeriodicalId":42852,"journal":{"name":"Meteorology Hydrology and Water Management-Research and Operational Applications","volume":"364 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76426783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"After COP24 Conference in Katowice - The Role of the Institute of Meteorology and Water Management - National Research Institute in Connection of Hydrological and Meteorological Measurements and Observations with Climate Change Adaptation Actions","authors":"M. Barszczewska, Ksawery Skąpski","doi":"10.26491/MHWM/109670","DOIUrl":"https://doi.org/10.26491/MHWM/109670","url":null,"abstract":"","PeriodicalId":42852,"journal":{"name":"Meteorology Hydrology and Water Management-Research and Operational Applications","volume":"25 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88444763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Estimation of the long-term cyclical fluctuations of snow-rain floods in the Danube basin within Ukraine","authors":"T. Zabolotnia, L. Gorbachova, B. Khrystiuk","doi":"10.26491/mhwm/99752","DOIUrl":"https://doi.org/10.26491/mhwm/99752","url":null,"abstract":"Floods are a periodic natural phenomenon, often accompanied by negative consequences for the local population and the economy as a whole. Therefore, knowledge of the trends of maximum flow have great practical importance, because it is the basis for planning and designing various hydraulic structures, hydrological forecasting, the mapping of flood risk, etc. In this paper, we analysed the long-term cyclical fluctuations of the maximum flow of snow-rain floods of the Danube basin within Ukraine (5 large rivers, 14 medium and 5 small). The database includes time series (34 gauging stations) of the maximum discharges of the cold period from the beginning of the observations up to 2015. The methodological approaches (developed by Gorbachova) are based on the use of hydro-genetic methods − namely the mass curve, the residual mass curve, and combined graphs. The presented results illustrate that the longterm fluctuations of the maximum flow of snow-rain floods are synchronous at all study gauging stations in the Danube basin within Ukraine, but these fluctuations are not always in the synchronous phase. We found that the maximum flow of snow-rain floods in the Danube basin within Ukraine have four types of long-term fluctuations, each with a different cycle duration.","PeriodicalId":42852,"journal":{"name":"Meteorology Hydrology and Water Management-Research and Operational Applications","volume":"43 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76848084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Karaoui Ismail, A. Boudhar, A. Abdelkrim, H. Mohammed, Sabri el Mouatassime, Ait Ouhamchich Kamal, Elhamdouni Driss, El Amrani Idrissi, Wafae Nouaim
{"title":"Evaluating the potential of Sentinel-2 satellite images for water quality characterization \u0000 of artificial reservoirs: The Bin El Ouidane Reservoir case study (Morocco)","authors":"Karaoui Ismail, A. Boudhar, A. Abdelkrim, H. Mohammed, Sabri el Mouatassime, Ait Ouhamchich Kamal, Elhamdouni Driss, El Amrani Idrissi, Wafae Nouaim","doi":"10.26491/MHWM/95087","DOIUrl":"https://doi.org/10.26491/MHWM/95087","url":null,"abstract":"Monitoring water quality in large dams is becoming a necessity for protecting stored water from various forms of pollution. This process requires analysis of several samples on a weekly or monthly basis. Our study aims to determine the relationship between water quality parameters (WQP) and digital data from the Sentinel-2 satellite to estimate and map the WQP in the Bin El Ouidane Reservoir. The in situ sampling was carried out in the Bin El Ouidane Reservoir (Azilal Province), followed by analysis of physicochemical parameters in the laboratory. These measurement results were compared with the reflectance in each sampling location to investigate the correlations between bands and laboratory chemical analysis results. The correlation results showed that all studied parameters have an R greater than 0.52, and they can be transformed to predictive models by stepwise regression. The accuracy of our proposed models was tested using the Oum Er-Rbia Hydraulic Basin Agency data, and the results showed that only three parameters yield admissible verification results (Chlorophyll A, dissolved Oxygen and Nitrate). Those models were then used in geographic information system software to produce a thematic map of each parameter over the entire surface of the reservoir. As a conclusion, the Sentinel-2 images could help indicate the eutrophication stage in the Bin El Ouidane Reservoir, which is a major risk in major Moroccan reservoirs.","PeriodicalId":42852,"journal":{"name":"Meteorology Hydrology and Water Management-Research and Operational Applications","volume":"17 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75547260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}