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EN
Every so often we witness a return of a hitherto unresolved topic about the hydraulic engineering works conducted by the Teutonic Knights in the vicinity of Lidzbark. There are several opinions concerning the location of and reasons for their endeavor. There is original documentation in Latin from the mid-14th century with a reference to the approximate location of the works. Subsequent information on this subject appeared at the end of the 19th century. On the basis of contemporary geological studies, the author tries to refute the thesis that the Teutonic Knights dug a trench from Cibórz to Lidzbark, thus connecting two rivers called Wel and Wkra. The presumed 14th-century construction is a watercourse from the Wel River in Bełk (below Cibórz) to Turza Mała and the Płośniczanka River. The Wel river was called Vcra (1260); Wykara (1303), Welle (1600), or Wkra (1945), while on the Henneberger map from 1600, the Płośniczanka river was called Wellefl uss, and the changes in its course are most visible in the vicinity of the Koty village. Presumably there was a translation error: the Teutonic Knights made a ditch in the vicinity of Cibórz and released water to Lidzbark, which was interpreted as: ‘The Teutonic Knights made a ditch from Cibórz to Lidzbark’. Contemporary geological studies and maps exclude the possibility of connecting the Wel and Wkra rivers in the Middle Ages, while in the Holocene, there was a natural connection, the trace of which is the old riverbed called Martwica. The article describes the present physical state of the area in the Lubawa region.
PL
Podjęty w artykule problem dotyczy wpływu specyficznych uwarunkowań realizacyjnych inwestycji hydrotechnicznych na planowanie robót. Celem artykułu jest omówienie czynników związanych z ochroną środowiska, mających kluczowe znaczenie w planowaniu i organizowaniu robót hydrotechnicznych na wodach śródlądowych. Wykorzystana została metoda studium przypadku wraz z analizą dokumentacji, posłużono się przykładem inwestycji polegającej na odbudowie zabudowy regulacyjnej rzeki Odry na odcinku od miejscowości Ścinawa do ujścia Nysy Łużyckiej, prowadzonej w ramach kompleksowego programu inwestycyjnego pod nazwą Projekt Ochrony Przeciwpowodziowej w Dorzeczu Odry i Wisły.
EN
The problem addressed in the article concerns the influence of specific conditions of hydrotechnical investments on the planning of works. The aim of the paper is to discuss the environmental factors of key importance in planning and organising hydrotechnical works on inland waters. A case study method with analysis of documentation was used as an example of an investment project consisting in reconstruction of the Odra river regulation structure on the section from Ścinawa to the mouth of Nysa Łużycka river, carried out within a complex investment programme named Odra – Vistula Flood Management Programme.
PL
Przedstawiono informacje o działaniach wodnych prowadzonych w Królestwie Polskim w latach 1843-1859. Informacje oparte są na sprawozdaniach przedstawicieli rządu składanych do Rady Administracyjnej Królestwa. Informacją objęto działania dla uspławnienia rzek (oczyszczanie i poszerzanie rzek), obwałowania Wisły i innych rzek oraz prace związane z utrzymaniem Kanału Augustowskiego.
EN
The article presents water initiatives carried out in the Kingdom of Poland in the years 1843-1859. The presented information is based on reports submitted by the government representatives to the Kingdom's Administrative Council. It includes initiatives aimed at making rivers more navigable (cleaning and widening), construction of flood embankments Vistula and other rivers and maintenance works on the Augustów Canal.
4
Content available remote Glebokie Lake in Szczecin after hydrotechnical regulations
EN
Water quality of the Glebokie Lake in Szczecin (NW-Poland) was studied in years 2012-2014. Glebokie Lake is a reservoir with a negative water balance related to the location draining groundwater drinking water intake for Szczecin agglomeration. In 2004 hydrotechnical regulations were conducted aimed at maintaining a constant amount of water in the lake, which involved a temporary feeding Glebokie Lake with Gunica River waters. In order to determine the hydrochemical status of the Lake waters and the factors shaping water quality - 19 water quality indices within 25 months were measured: temperature, pH and water oxygen status, nutrients (N, P) and ionic macrocomponents and Fetot. Trophic status of the lake waters using the Carlson criteria was defined. On the basis of chemometric analysis of measurement data (CA, PCA/FA and DA) we established that statistically significant factors affecting water quality in the study period were: seasonal (the climatic seasons) changes in the biological processes activity, periodical (in April and November) waters inflows from the Gunica River, anthropopressure in during swimming season and the coagulant (FeSO4) presence in the ecosystem. The possibility of applying the chemometric techniques to interpret measurement data in the lake type like Glebokie Lake with a small amount of data has been shown.
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