Program zabudowy hydrotechnicznej lewego dorzecza Odry w I połowie XX wieku

The article attempts to present the reasons, course and effects of hydrotechnical works on the left basin of the Oder river. Research made to date in this field has been limited mainly to the Oder river itself, with no consideration for its tributaries that have a profound influence on the shaping of hydrological regime of the river. On the basis of archive materials and source literature, we analyse conditions of realization of the regulation programme, reconstruct the network of hydrotechnical facilities that were built, and indicate environmental and economic repercussions of reshaping the tributaries of the left basin of the Oder river.