Profiles of groundwater observation wells are installed at the Project sites in order to monitor the hydrological regime of the mires. The well depth is 1,5-3 m, depending on the thickness of peat layer. Totally there are nine profiles with 26 + 16 + 13 + 8 = 63 wells.

Four profiles are installed in the protected area „Aizkraukles purvs un meži”: (I) perpendicular to the large ditch witch will be dammed during the Project – 7 wells; (II) – near the small ditches, where dams will be constructed – 7 wells; (III) – near the existing ditch along the operating peat fields, to observe the influence of the ditch – 7 wells; (IV) – in the wet forest and forest to observe the influence of management measures on adjacent forests – 5 wells.

Two profiles are installed in the protected area „Aklais purvs”: (I) near the source of Girupe stream, where dams will be constructed – 8 wells; (II) near the partially overgrown ditch, where dams will be constructed – 8 wells.

One profile and one group of the wells was installed in the protected area „Melnā ezera purvs”: (I) group of the wells around the former peat extraction field, where water is standing now – 6 wells; (II) near the ditch, where the dams will be constructed – 7 wells.

One profile was installed in the protected area „Rožu purvs” near the furthest ditch in the ditch system, where dams will be constructed – 8 wells.

The wells were installed on November 2010. Groundwater level is measured twice per month manually, using water level meter, starting from December 2010.

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