前14年 meaning in English

14 bc

When xiaolangdi project completed and put into orperation , the inflow of water and sediment condition will be changed because of the regulation of the reservoir . especially the initial 14 years , the reservoir will hold up sediment and release clear water , which may affect the river sections in henan province , especially the wandering sections . it will result in changes of flow state and endangering the water works , because the longitudinal addend by scouring and lateral slope failure
小浪底水库建成运用后，通过水库的调水调沙，改变了黄河下游的来水来沙条件，尤其是运用的前14年处于拦沙期，下泄清水，对河南河道的影响最为剧烈，对游荡性河段的河势变化将产生很大影响，河道纵向冲刷下切，横向滩岸坍塌，工程出险将大量增加。