rising and falling of flood water level not only leads to the increase and decrease of underground water near the bank, but also restricts the change of runoff outflow routing.
洪水的涨落不仅引起河岸附近地下水蓄水量的增减,同时也制约着地下径流过程的变化。
increasing of water and decreasing of gradient of channels, the flood water level rose abnormally in some local sections of river.
来水量增多而河道比降变小,造成局部洪峰水位异常壅高。
in the 1990s, the flood water level was lower than before at most stations in the river network of the pearl river delta under the same grade of runoff.
90年代以来,珠江三角洲网河区大部分水位站同级流量的洪水位普遍下降的同时,局部河段洪水位却异常壅高。
then, the distribution parameters of the probability model are amended using the small sample of the measured highest flood water level of last 10 years.
再利用后10年的实测最高洪水位的小样本,对模型的分布参数进行了修正。
in this paper, introducing the way for ascertain design flood water level of inundate area using saint-venant equations and some special methods.
在内涝区采用圣维南方程组及一些特殊处理的方法来推求设计洪水位是比较科学的。