Topic
Lake capture
About: Lake capture is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 308 citations.
Papers
TL;DR: In this article, three-dimensional modeling that integrates fluvial sediment transport, crustal-scale tectonic deformation, and lithospheric flexural subsidence is carried out to simulate the landscape and drainage evolution of the Ebro sedimentary basin (NE Iberia).
Abstract: [1] Three-dimensional modeling that integrates fluvial sediment transport, crustal-scale tectonic deformation, and lithospheric flexural subsidence is carried out to simulate the landscape and drainage evolution of the Ebro sedimentary basin (NE Iberia) The Ebro Basin underwent a long period of closed intramountain drainage as a result of tectonic topography generation at the Pyrenees, the Iberian Range, and the Catalan Coastal Range In the late Oligocene, the Catalan Coastal Range underwent extension leading to the formation of the Valencia Trough (NW Mediterranean), but the Ebro Basin remained closed for nearly 15 Myr more before the Ebro River cut through the remnants of the topographic barrier This drainage opening caused widespread basin incision that shaped spectacular outcrops of the syntectonic and posttectonic infill Here we investigate the processes controlling these major drainage changes The modeling results, constrained by a large data set on the tectonic and transport evolution of the area, predict a closed phase characterized by a large lake in the central eastern Ebro Basin Dry climatic conditions probably lowered the lake level and contributed, together with rift flank uplift, to prolong this endorheic basin stage The age and amount of reworked sediment after the opening are consistent with an onset of basin incision between 13 and 85 Ma as a result of lake capture by escarpment erosion and lake level rise associated with sediment accumulation and wetter climatic conditions Sea level changes in the Mediterranean had no major impact in the large-scale drainage evolution of the Ebro Basin INDEX TERMS: 1625 Global Change: Geomorphology and weathering (1824, 1886); 1815 Hydrology: Erosion and sedimentation; 3210 Mathematical Geophysics: Modeling; 3344 Meteorology and Atmospheric Dynamics: Paleoclimatology; 8102 Tectonophysics: Continental contractional orogenic belts; KEYWORDS: Pyrenees, drainage evolution, lake, sediment budget, erosion, flexure
302 citations
TL;DR: In this article, the causes and effects of changes in connectivity between two large sedimentary basins separated by an elevated barrier were investigated using a pseudo-3D code integrating tectonics, surface processes and isostasy.
56 citations
TL;DR: In this paper, an inventory of known scour holes and associated morphological parameters is developed using the results of recent and past surveys, and it is shown that presence of scour bays indicates deeper-than-expected holes while repeat surveys of three holes indicate stability.
Abstract: A unique feature that has been detected in the course of past morphological studies of Mackenzie delta channels, and which is of particular concern to the design of pipeline crossings, is the frequent occurrence of very deep scour holes. A recent survey along East Channel revealed many additional holes, with maximum depths ranging from 13 to 37 m. Using the results of recent and past surveys, an inventory of known scour holes and associated morphological parameters is developed. Most holes occur near bends, and often next to recesses in the channel boundaries, known as scour bays. It is shown that presence of scour bays indicates deeper-than-expected holes while repeat surveys of three holes indicate stability. Previously postulated formative mechanisms of bay-associated holes are critically examined; scour under ice jams is eliminated while lake capture is considered likely. Practical implications of the present findings are discussed and research needs outlined.
14 citations
TL;DR: In this paper, chemical mass balance for calcium was used to estimate groundwater inflow to the lake at 6.3 × 106 m3, almost equal to the volume of storm water discharge and slightly higher than the previous estimates using environmental isotopes.
Abstract: Blue Lake, a volcanic crater provides
municipal water supply to the city of Mount Gambier, population of 26,000.
Current average annual pumping from the lake is 3.6 × 106 m3.
The lake is fed by karstic unconfined Gambier Limestone aquifer. Storm water of
the city discharges to the aquifer via about 400 drainage wells and three large
sinkholes. Average annual storm water discharge is estimated at approximately
6.6 × 106 m3 through drainage wells and sinkholes within
16.8 km2 of the central part of the city. Chemical mass balance for
calcium was used to estimate groundwater inflow to the lake at 6.3 × 106 m3, almost equal to the volume of storm water discharge and slightly
higher than the previous estimates using environmental isotopes (4.8 - 6.0 × 106 m3). Considering the lake outflow volume of 2.7 × 106 m3,
the net inflow to the lake equates to the current annual pumping and therefore
it is considered that the current pumping rate is at the upper limit. For
meeting the short-term future demand, confined aquifer water may be used and in
the longerterm, an additional well field is required outside the Blue Lake
capture zone, preferably to the north-east of the city. For water supply
security, inflow to the lake along with water quality has to be maintained
within the city. Current annual private abstraction within the capture zone is
about 4.4 × 106 m3 and in order to maintain aquifer water
levels, no additional allocation should be allowed.
3 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2014 | 1 |
| 2011 | 2 |
| 2003 | 1 |