BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI Publicat de Universitatea Tehnică „Gheorghe Asachi” din Iaşi Tomul LXI (LXV), Fasc. 4, 2015 Secţia CONSTRUCŢII. ARHITECTURĂ BAHLUI RIVER RECREATION AREA ARRANGEMENT BY COSTEL BOARIU * and CONSTANTIN BOFU “Gheorghe Asachi” Technical University of Iaşi Faculty of Hydrotechnical Engineering., Geodesy and Environmental Engineering Received: October 26, 2015 Accepted for publication: November 20, 2015 Abstract. Bahlui River cross Iasi basically dividing the city in two. The length of water in the city is about 11 km. Following the complex work upstream, Iasi is protected from floods with probability of 1%. A sustainable development of the river for recreational and tourism is further needed. This article presents a consistent and spectacular solution for leisure and tourism development for the central area of Iasi, crossed by the Bahlui River. To achieve constructive solution works crossing, bridge hydraulic calculation method of the normative PD 95-2002 must be improved. The article proposes a method for calculating this correction. Key words: river engineering; bridge hydraulics. 1. Introduction The river had a total length of 119 km and an annual average flow of 2.8 m³/s. The basin area is 1967 km². Its sources are at an altitude of 500m in the vicinity of Tudora village (Botoşani County), on the eastern side of Suceava Plateau. Between 1911 and 1913, a series of adjustments were done to the riverbed around and in Iaşi. As a result of melting snow and heavy rainfall, the Bahlui would overflow and flood the lower parts of the city, turning it into a * Corresponding author: e-mail: costelboariu@gmail.com