VI. 2. Altitude planning background and surface water drainage:a. the planning level:-With the natural characteristics and status quo of the area, and the base-oriented city planning, urban planning solutions selected height applied to the planning area as follows:-With regard to the new construction area: held up the background created by construction, ensure foolproof control Hxd ≥ 2.8 m.-The axis of roads in the area were renovated and new construction to meet minimum design height H = 2.20 m and H = 3.00 m
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