the Subject of this contract is

For Lot 1: to implement the methods of monitoring the water quality of the two bodies of water of the Paarc

For lot 2: to determine the terms of forgery of the 2 bodies of water. The mowing operations may cover both bodies of water or only one of them as needed.

The purpose of this lot is to implement the methods of monitoring the water quality of the two bodies of water of the paarc.

more than the realization of a simple list of samples and analyzes, the service provider will have to provide technical expertise both on the interpretation of the results and on their impact on the activities proposed on the two sites. It will have to examine precisely the evolution of water bodies over the years during the duration of the contract.

in addition, the phenomena of cyanobacteria development and proliferation of macrophytes being linked, the service provider will have to take into account this problem to advise the various managers of the site in the planning of faucardage operations (disjoint market).

The purpose of this lot is the implementation of a preventive system for cutting and collecting invasive plants on the Paarc basin of the aa. According to the development of macrophytes on the body of water managed by the Sivom of the banks of the aa and the Colme, the same methodology will have to be implemented.

The development of these macrophytes is largely influenced by weather conditions and the management of the water body will require a high reactivity of the provider.

in addition, the basin of the nautical stadium (2237 m x 138 m) and the recreational body of water will not be affected in their entirety by this problem. The areas concerned by the development of macrophytes are distributed in a non-homogeneous way on the body of water.