A time length of ten years and the calculated heads of 1997 were used for model prediction . the predictive simulation showed that the continued pumping will cause relatively high changes in head distribution and increase average drawdown to 16 % after 10 years 在十年的預(yù)測(cè)期內(nèi),采用1997年的地下水計(jì)算水位作為初始水位用于模型的預(yù)測(cè),結(jié)果表明持續(xù)的地下水開(kāi)采會(huì)引起地下水水位的大幅度下降,十年以后平均降深會(huì)增加16 。
It is more accurate than traditional method at the aspect of calculating head loss , pipe flow and node pressure of hydrant . this mathematic model can also be used in the inside and outside of water supply piping calculation and it is excel hardy cross - piping calculation 該方法在計(jì)算水頭損失、管段流量、消火栓節(jié)點(diǎn)壓力等方面比傳統(tǒng)方法要更加準(zhǔn)確,也可被借鑒到室內(nèi)或室外的給水管網(wǎng)計(jì)算,并優(yōu)于常見(jiàn)的哈代-克羅斯管網(wǎng)平差方法。