BD-L-TC “Water surface”

natural or artificial water surface, permanent or non-permanent. NATURE: 0 stream surface 1 stagnant water surface 2 wetlands 3 basins 4 sewage basins 5 swimming pool 6 fish farming Selection criteria: 0: surface of streams with permanent flow. Minimum width 3.5 m.1: permanent water surface without flow: lake, pond, pond with a smallest dimension of more than 20 m. Water retentions are treated in this class and are updated if their surface area has increased 50 %. 2:wetland area surface greater than 2 Ha, marsh, aquatic vegetation. 3: open-pit pool. Sewage treatment plant, swimming pool or fish farm basins are treated with a particular attribute value.The most small dimension should be greater than 10 m and the masonry contour. 4: basin of treatment plant with a smallest dimension of more than 10 m and the masonry contour. 5: pool basin of which the smallest dimension must be greater than 10 m. 6: fish farm basin with a smallest dimension of more than 10 m and the masonry contour.