河川径流量(amount of river runoff) 河川径流量是指通过流域出口断面的全部水流数量,包括大气降水转化为地表水的部分,地下水出露(出渗)形成地表水的部分,并扣除沿途蒸发、河流渗漏流失的水量,其多年平均值表征了该流域从外界获得补给量的平均水平。
全市的水资源总量、地下水、河川径流量呈减少趋势，与降水的变化具有明显的一致性。
Water resources total quantity, underground water and runoff of river assumes the reduced tendency, has the obvious uniformity with the precipitation change.
而地表径流量、次地表径流量、地下径流量及河川径流量主要受降水量变化的影响，受气温变化的影响相对较小。
But the surface runoff, subsurface runoff, ground water and runoff are mostly effected by precipitation. The temperature influence on them is comparative less.
河川天然径流量变化与趋势预测研究对陆地水循环与水量平衡研究和水资源利用等均有重要意义。
Natural runoff variety and current forecasting researches are very useful for terrestrial water cycling and water balance research and water resources management.
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