Channel and island change in the lower Platte River, Eastern Nebraska, USA: 1855–2005

Architecture, heterogeneity, and origin of late Miocene fluvial deposits hosting the most important aquifer in the Great Plains, USA

“…Large lakes were absent on the Platte rivers in historic times (cf., Joeckel and Ang Clement, 2005;Joeckel and Henebry, 2008;Horn et al, 2012). The Holocene channel belt of the Middle Loup River, however, exhibits small (≤ 25 m in width and ≤ 1200 m in length) abandoned channels filled with standing or very slow-moving water (Figure 16), and these features are at least partially analogous to the ancient depositional environments of PW architectural elements described herein.…”

Progressive abandonment and planform changes of the central Platte River in Nebraska, central USA, over historical timeframes

“…(v) Point-to-point channel widths were measured along transects at 3-km intervals (Figure 1) and at a scale of 1:5000 for individual years during the period 1858-2006. Anastomosing channels, in places separated from the main flow of the river for tens of kilometers, which are present in both the nineteenth-century GLOs and in aerial photographs, are considered to be long-lived (Figure 2a). For statistical analysis, these anabranches are designated "first-order anabranches" and are collectively measured as single channels separated by channel islands, as per Joeckel and Henebry (2008). The term "second-order anabranches" (Figure 2b) refers to the smaller, secondary channels within the braided stream formed because of post-1940s stabilization of channel bars into islands by vegetation that render individual channels immobile.…”

“…Williams, 1978;Eschner, 1983;Eschner et al, 1983;Johnson, 1994;Johnson and Boettcher, 1999;Joeckel and Henebry, 2008). Channel constriction, from the construction of dams and diversion canals for irrigation, and encroachment of riparian vegetation into formerly open channels, have been shown to be primarily responsible for these changes (Johnson, 1994;Osterkamp and Hupp, 1996;Johnson and Boettcher, 1999;Thoms and Sheldon, 2000;Bennett and Simon, 2004).…”

“…Assessments of changes in planform and bank conditions on the Platte River have typically utilized historical maps and aerial photography (e.g., Williams, 1978;Johnson, 1994;Johnson and Boettcher, 1999;Joeckel and Henebry, 2008), as does this study. In the previous studies, however, the resolution of time was comparatively coarse because the primary sources of data were aerial photographs of the Platte River taken at intervals of 5-17 years.…”

Remotely Sensed Trajectory Analysis of Channel Migration in Lower Jingjiang Reach during the Period of 1983–2013

“…As an accurate, cost-effective, multi-spectral and multi-temporal source of information, remote sensing has been extensively utilized to assess planform morphology change in many river basins. Morphometric parameters, such as channel width [5,6], water surface area [7] and sinuosity [8], were calculated in several studies to evaluate the migration of channel planform morphology. Bank erosion and deposition [9,10], channel pattern identification [11,12], bank line and centerline shift [13] and channel change caused by human intervention [14,15] have been investigated on the basis of remotely sensed data.…”