Groundwater and surface-water interaction refers to the bidirectional exchange of water, solutes, heat, and sometimes contaminants between aquifers and surface-water bodies such as rivers, lakes, wetlands, and estuaries. This interaction is governed by hydraulic gradients, permeability contrasts, geological heterogeneities, and temporal variability in recharge and evapotranspiration. It encompasses processes such as baseflow discharge, bank storage, hyporheic exchange, and infiltration from surface water to aquifers, which together control streamflow regimes, water quality, redox conditions, and ecological habitat. Quantifying these exchanges is critical in hydrologic modeling, water-budget analysis, contaminant transport studies, and integrated water-resources management under changing climatic and anthropogenic stresses.
The latest update of nationwide flood maps, to be released next year, will give communities across New Zealand the clearest picture yet of the regional risk of flooding.
Environment
7 hours ago
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Groundwater pumped to irrigate cannabis crops in California's Emerald Triangle can cause some streams that normally run year-round to dry up entirely during summer, say researchers from Simon Fraser University, the University ...
Earth Sciences
Aug 4, 2026
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The small mountain streams that feed many of the West's rivers may face a much drier future. A new study led by NAU researchers found that groundwater-fed streamflow, known as base flow, has been steadily declining across ...
Environment
Aug 2, 2026
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As water shot into an open stock tank atop a high-country mesa, a trickle soaked the dusty earth below. Scott Snyder rose from the shade to fasten a hose and stop the spillage.
Environment
Jul 28, 2026
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Across a narrow watershed in Asakura, a rural city in Fukuoka Prefecture, centuries-old stone channels still guide water through fields and into the river below. Today, those same systems are the focus of researchers at Kyushu ...
Environment
Jul 11, 2026
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More than 90% of the key nutrients degrading the Mar Menor, such as ammonium, phosphorus and silica, do not come from streams or continental groundwater, but rather through a mechanism that has so far been overlooked: Water ...
Earth Sciences
Jul 8, 2026
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AIMS scientists are quantifying the amount of groundwater flowing from the land to the Ningaloo Reef in Western Australia to help understand the viability of blue carbon storage solutions to reduce the impacts of climate ...
Environment
Jun 18, 2026
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Researchers at the Leibniz Centre for Agricultural Landscape Research have investigated how water from streams can be stored in the aquifer during wet periods. Using an area in the lower Spree catchment in Brandenburg as ...
Earth Sciences
Jun 13, 2026
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Nitrate pollution is a growing global environmental challenge due to the extensive use of fertilizer. A study published in Science, led by the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB) with the Helmholtz ...
Earth Sciences
Jun 12, 2026
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An international team of scientists has demonstrated how powerful thunderstorm complexes over the U.S. Corn Belt are fueled by moisture rising from the region's fertile fields or just beneath them. The findings can lead to ...
Earth Sciences
May 27, 2026
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