Groundwater hydrochemistry, Alluvial plain of the Yellow River, Industrial agglomeration area, source identification
compost, sludge, Fe3O4 nanoparticles, electron transfer capacity, humification
heavy precipitation, ecological water replenishment, groundwater resource, Machine learning, variation characteristics, analysis and prediction
: chromate, zero valent iron, pyrite, dissolved oxygen, reduction
fluorescence spectroscopy, PM2.5, DOM, bacterioplankton, urban river