The distribution of precipitation is a particularly important factor in periods of critical crop plants which the greatest demand for water. At this work a number of meteorological characteristics associated with precipitation got in Puczniew station in years 1972-2002 were analysed: annual and six-month sums of precipitation; changeability of sums of annual and six-month precipitation (with using the division of years and months on extremely dry, very dry, dry, average, wet, very wet and extremely wet surface); number of days with precipitation (in periods < 10 mm, 10.1 -20 mm, 20,1-30,0,0 mm, 30.1-40.0 mm and above 60.0 mm); appearing of rainless periods. In examined 31-years from1972 to 2002 the averaged annual sum of falls in Puczniew amounted to 540.7 mm. From performed analysis we obtained none of years extremely dry and particularly humid: 2 years stayed ranked to dry, 27 - up to averages, 2 - to humid. Years 1983 and 1989 were dry, however year 1977 was humid and 2001 very humid. On average within one year it appeared about 3 rainless periods, appearing mostlyin summer year (59% of cases), and dominating droughts have lengths from 9 up to 17 days (90%). ...
The subject of the study is quaternary groundwater intaken by 10 drilled wells numbered as follows: S-7a, S-9a, S-11b, S-12b, S-15a, S-16a, S-17a, S-18a, S-20a and S-21 constructed in the period 1971 - 1993 and forming "Stare ujęcie" located in Stalowa Wola. Total manganese concentration in waters of "Stare ujęcie" intake falls within the range from 0.001 mgMn•dm-3 to 2.57 mgMn•dm-3, and total iron - from 0.01 mgFe•dm-3 to 6.50 mgFe•dm-3. Given the quality classification of "Stare ujęcie" waters - they predominantly belong to 3rd and 4th class and their quality is unsatisfactory. The chemical composition variability of the intaken waters is spatially presented in the study in the form of hydroisolines, while the temporal variability was discussed descriptively and with the use of statistical coefficient of variation. The variability of total iron concentration in waters of "Stare ujęcie" is very high in the case of wells S-7a and S-17a, in the case of wells S-9a, S-18a, S-20a and S-21 - it is high, while in well S-15a the variability is medium. Concentration of total manganese in waters of wells S-15a and S-18a is characterized by low variability, in waters of wells S-7a, S-9a and S-21 - by medium variability, ...
