Estimating wetland connectivity to streams in the Prairie Pothole Region: an isotopic and remote sensing approach.

摘要: Understanding hydrologic connectivity between wetlands and perennial streams is critical to understanding the reliance of stream flow on inputs from wetlands. We used isotopic evaporation signal in water remote sensing examine wetland-stream within Pipestem Creek watershed, North Dakota, a watershed dominated by prairie-pothole exhibited an evaporated-water that had approximately half isotopic-enrichment found most evaporatively enriched Groundwater adjacent values indicated recharge winter precipitation no significant evaporative enrichment, indicating surface did not contribute significantly groundwater discharging into Creek. The estimated surface-water area necessary generate was highly dynamic, varied primarily with amount discharge, typically greater than immediate area, surficial contributed throughout summer. propose dynamic range spilling thresholds for across allowing wetland even during low periods. Combining Landsat estimates approach allowed determination potential (Landsat) actual (isotope) contributing areas wetland-dominated systems. This combined can give insights changes location magnitude pathways over time. be other where results sufficient signal.