东营某沉砂池咸化规律及应对措施

Salting Regularity in Sedimentation Tank and Countermeasures in Dongying

摘要:

沿海地区水库及沉砂池由于离海较近，受海水上溯的影响较大，容易导致水体氯化物升高，甚至超过地表水质量标准要求。东营市某沉砂池为黄水东调的关键枢纽，存在水面大、上覆水深分布不均匀、水质咸化等问题，通过对该沉砂池氯化物变化情况进行研究，以了解咸化规律，探索减缓咸化的措施。经研究发现：风力及水位对沉砂池各取样点氯化物变化影响较大；蓄水期各取样点氯化物数值均经历了进水波动期、混合稳定期、同步增长期3个时期变化。针对得出的咸化规律，提出管理和工程措施建议，以减缓水质咸化进程。

Abstract:

The reservoir and sedimentation tank in coastal areas are close to the sea, so that they are greatly affected by the upstream flow of seawater, which is easy to lead to the rise of chloride in water, and even exceed the requirements of surface water quality standards. The sediment tank in Dongying Municipality is a key hub of Yellow River diversion to the east area, and there are problems such as large water surface, uneven water depth distribution and saline water quality.The change of chloride in the sediment tank is studied to understand the salinity rule and explore the measures to slow down the salinity. It is found that wind and water level have great influence on the variation of chloride at each sampling point in the sand settling basin. The chloride value of each sampling point experienced three terms of influent fluctuation period, mixed stable period and synchronous increasing period. According to the obtained rule, management and engineering measures are proposed to slow down the salting process of water quality.