Water and sediment flows to the delta have declined dramatically since the 1970s, due to both reduced rainfall and explosive urban and agricultural demand for water upstream.
1970年以来，由于降雨量的减少，加之黄河上游城市化与农业用水的爆发式增长，流到黄河三角洲的河水和泥沙在急剧减少。
The result shows that application of system dynamics model to predict urban water demand has the advantages of strong systematicness and high accuracy of prediction result.
结果表明，应用系统动力学模型预测城市需水量，系统性强，预测结果准确度高。
Because of the expanding urban green space and more construction of urban ecological environment, the water demand is increasing.
同时由于城市建设的需要其园林绿地面积不断扩大，其需水量不断增加。
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