the purpose of this contract is to carry out studies called "Management of Aquatic Environments" with the hydromorphological study of watercourses, on the territory of the SMSO, and the Mauldre watershed in the departments of Yvelines (78) and Val d'oise (95)
lot 1: GEMA - Seine axisrealization of studies called "Management of Aquatic Environments" with the hydromorphological study of watercourses on the geographical lot Axe Seine
lot 2 - gEMA - bV La Mauldrerealization of studies called "Management of Aquatic Environments" with the hydromorphological study of watercourses on the geographical watershed of the Mauldre
lot 3 - gEMA - tributaries Left bank of the Seinerealization of studies called "Management of Aquatic Environments" with the hydromorphological study of watercourses on the geographical tributary Left Bank of the Seine
lot 4 - gEMA - right bank tributaries of the Seinerealization of studies called "Management of Aquatic Environments" with the hydromorphological study of watercourses on the geographical area tributaries right bank of the Seine