引黄水在北大港水库蓄存期水质咸化的研究

依据引黄水在北大港水库蓄存期水质咸化的事实以及传质理论,定性地分析了引黄水水质咸化的主要原因,包括盐碱土传质作用、蒸发浓缩作用以及风的扰动加速传质作用等.在北大港水库旁修建了一个模拟试验水池,进行了现场模拟试验研究.依据水量平衡和氯离子总量平衡的原理,分别定量地计算了传质作用和蒸发浓缩作用对水质咸化影响的比重.结果表明,在模拟水池蓄水后的30 d内,传质作用对水质咸化影响的比重有随时间增加而增长的趋势;30 d后,传质作用对水质咸化影响的比重稳定在80%,蒸发浓缩作用对水质咸化影响的比重稳定在20%,说明导致水质咸化的最主要因素是盐碱土传质作用.

Study on salinization of water channeled from Yellow River in Beidagang reservoir during the stored period

Based on salinization of water channeled from Yellow River being stored in the Beidagang Reservoir and the mass transfer theory,it qualitatively analyzed that the main salinization mechanisms are the salinity transfer of saline soil,the evaporation concentrating and the agitation of wind.A simulation trial pond was built beside the reservoir and some researches were done.Based on water and the solute balance in the simulative pond,the proportions of water salinization by salinity transfer of saline soil and the evaporation concentrating are calculated quantitatively.It was showed that the proportion of salinity transfer of the saline soil increased with time more than 30 days and that the proportion of salinity transfer of the saline soil remained 80% and evaporation concentration is 20% after 30 days.This indicates that salinity transfer of the saline soil is the most important one of all factors of the water salinizaion.