RESEARCH ON WATER DEMAND PLANNING OF URBAN LANDSCAPE ECOLOGICAL ENVIRONMENT

Taking a planning garden in Jinan City as the research object, the urban landscape ecological environment is divided into two parts: the urban river and lake system and the urban green space system. Aiming at the urban river and lake system, the river and lake water surface evaporation calculated by the water balance formula is 9.5-94.9 m(3)/m(2).month, and the permeation volume of the river and lake calculated by Darcy's law is around 0.034-0.053 m(3)/m(2).month. The basic ecological water demand of the river calculated from the minimum monthly average flow method is from 18 to 39.5 m(3)/m(2).month, and the total water demand of the river and lake system is estimated around 30.875-76.47 m(3)/m(2).month. Jinan area needs artificial water replenishment in summer (June-August) from 18,000 to 25,000 m(3)/m(2).month. In winter (November to February next year), the river is in a freezing period, and no water supply is required. For the green space system, the green rate is 32%. According to the urban green rate rules, the standard green rate (100%-120%) cannot be reached. It is concluded that the green area in the planned park should be increased by 19.22km(2).