The Spatio-Temporal Dynamic Patterns of Shallow Groundwater Level and Salinity: The Yellow River Delta, China

Shallow groundwater in coastal aquifers is a highly dynamic and complex system with high risk of seawater intrusion. Analyzing the spatio-temporal patterns can help to manage resource prevent it from degradation. Based on level (GWL) electrical conductivity (EC) monitoring data 18 observation wells Yellow River Delta (YRD) 2004 2010, this research analyses dynamics using robust seasonal trend decomposition technique (STL) spatial interpolation method detect salinity. Combined hydro-climatic data, Pearson correlation Mann-Kendall (MK) analysis were used further reveal impacts that induce their trends variations. Our show intrusion into local shallow region high, mean over 42% lower than sea level, EC 96% met standards for In addition, generally declined by 0.01~0.45 m/a salinity increased 1.153~25.608 μs/cm.a, which are consistent precipitation decline. The correlated components rainfall evaporation. It be concluded extent will increase future rise. approaches study proved effective certainly serve as an example other regions.