基于Darcy定律的非专业井地下水位监测数据质量优化算法研究

Research on Data Quality Optimization Algorithms of Unprofessional Groundwater Monitoring Based on Law of Darcy

非专业井地下水监测是目前地下水监测重要的方法之一,在用水期机井持续抽水严重影响非专业井监测数据质量.由于农业机井泵抽水的较大流量和井内水位到泵抽水处有限的水位差,在短时间内达到了与水压差相对平衡的机井壁水位,此时机井内壁水位只跟随井外壁的水位变化而变化.针对这种情况,本文首次提出了一种基于Darcy定律并结合水泵流量—扬程特性曲线方程对水位观测值反演井外壁含水层真实水位的算法,并首次将该算法应用于非专业井水位监测上,实验地点是太原市小店区龙堡村井.结果表明,在抽水泵长期抽水因素干扰下,经过该算法优化后的农用井水位监测数据更接近附近专业井监测的数据,说明该算法在一定条件下的实用性.

Unprofessional groundwater monitoring well is one of the important methods in groundwater monitoring.The continual pumping of water seriously affects the data quality of unprofessional monitoring well.Due to the mass flow from the agricultural-pumped-water well and the limited water level difference from the internal water level of water well to the water level from where the water is pumped,the water level difference of internal water well can reach to a constant position in a short time,in the meanwhile the water level in the well only changes with the that of the external well＇s.To solve this problem,a kind of water level algorithm is put forward based on the law of Darcy.With the algorithm we can calculate the real water level of external well according to the observation value of water level.And the algorithm is used in the field experiment in the well in Longbao village,Xiaodian District,Taiyuan.The results show that the algorithm enables to increase the reliability of the observation data,which also lays a good foundation for the further analysis and research of the water level.