Land use contribution to spatiotemporal stream water and ecological quality: Implications for water resources management in peri-urban catchments

•Seasonal variability confounds land-use source contribution in peri-urban streams.•No robust ecological improvement despite implementation of Nature-based solution.•Nematode-based stress index reveals impacts and benefits of wastewater effluents.•Contaminant-bound particles and other chemicals stressors may be overlooked.