Estimate of precipitation uniformity in Southeastern Srem and its application in soil reclamation, I: Correlation analysis of precipitation in Southeastern Srem aiming at the supplementation of missing data

Abstract

In the design of reclamation systems, there are frequent cases of discontinuous measurements of precipitation. As precipitation can have rather non-uniform temporal and spatial distributions the objective of this paper is to identify the main characteristics of precipitation for the region of Southeastern Srem, to calculate the correlation between the data from different gauging stations, so as to be able to supplement the data in the part of the area where the measurements are missing. The precipitation amounts recorded at the study pluviometric stations show a good correlation with the precipitation amounts recorded at the basic meteorological stations both for annual precipitation, and for monthly precipitation. The correlation is the strongest in autumn and winter (up to 0.99), and because of spring and summer storms, often of strong intensity, correlation coefficients are a little lower in these seasons. It should be concluded that there is a very good agreement between the results of: arithmetic mean method - 633.3 mm, Thiessen polygon method 628.08 mm and isohyetal method 632.8 mm. This is explained by the fact that the terrain is flat and that the selected stations cover the area uniformly. The missing data can be supplemented based on regression equations. .

Pri projektovanju melioracionih sistema često postoje delovi područja na kojima nisu izvedena kontinuirana merenja padavina. S obzirom da padavine mogu imati veoma neravnomernu vremensku i prostornu raspodelu, cilj ovog rada je da se za područje jugoistočnog Srema utvrde osnovne karakteristike padavina, ispita korelaciona veza između podataka sa različitih stanica u cilju mogućnosti dopunjavanja podataka na delovima područja gde merenja nedostaju. Padavine na osmatranim kišomernim stanicama pokazuju dobru korelaciju sa padavinama na baznim meteorološkim stanicama i to za godišnje sume padavina, kao i za mesečne. Vrednosti koeficijenata korelacije za mesečne sume padavina su r=0.77-0.90 a na nivou godišnjih suma padavina r - 0,60 do 0,96. Korelativna veza je najjača u jesen i zimu (do 0.99), dok su zbog prolećnih i letnjih pljuskova, često jakog intenziteta, koeficijenti korelacije nešto niži u tim godišnjim dobima. Treba konstatovati veoma dobro slaganje između rezultata: aritmetička sredina - 633.3 mm, metoda Thiessenovih poligona - 628,08 mm i metoda izohijeta - 632.8 mm. Ovo se obrazlaže činjenicom da je teren ravničarski i da izabrane stanice ravnomerno pokrivaju područje. To daje mogućnost dopunjavanja nedostajućih podataka na osnovu regresionih jednačina. .