Relationships in regional groundwater discharge to streams: An analysis by numerical simulation

摘要: Baseflow components of streamflow were determined for 32 selected basins in the Plains Regions Alberta. Plots baseflow per unit area vs. total basin surface (q(A) curves), show a rapid increase rate with initial area, followed by reduced at larger areas, thereby suggesting functional dependence on size. The empirically relationships studied numerical simulations groundwater flow two-dimensional vertical sections type environments Alberta Plains. These models that develop according to theory regional gravity groundwater. types discharge indicate greater areas (areas low topography and including local recharge regions) than high regions). An asymptotic discharge-drainage relationship was obtained this analysis, which showed specific from headwaters downgradient setting. At above 10 000 km2, approaches maximum value asymptotically further area. signifies loss water elevation pattern consists all local, intermediate systems. Several hydrogeological environmental parameters act modify shape nature relationship; namely, depth width ratio, slope, geology basin. Low ratio slope convert stationary gives constant entire range identifies wholly systems. Contrarily, presence aquifers transform into linear describes area. Inverse or mirror images three are formed when is plotted against increases upgradient towards headwaters. uncovered study demonstrate quantitatively sub-basins topographic elevations possess more those equivalent sizes topography. For example, an 5000 m2 elevation, discharges naturally 1.4 × 10−2m3s−1m−2, whereas similar would 7.8 10−3m3s−1m−2.