Ferencz_et_al_2021_bedheat_data_and_modeling


Authors:
Owners:
Resource type: Composite Resource
Storage: The size of this resource is 17.6 MB
Created: Jan 06, 2021 at 8:23 p.m.
Last updated: Jan 11, 2021 at 5:23 p.m.
Citation: See how to cite this resource
Content types: Single File Content 
Sharing Status: Public
Views: 67
Downloads: 4
+1 Votes: Be the first one to 
 this.
Comments: No comments (yet)

Abstract

This study combines detailed field observations and flow and heat transport modeling to assess the impact of hydropeaking on riverbed temperatures in a large regulated river. The field site was 12 km downstream from a dam that induces large daily flow variations. Vertical thermistor arrays were used to collect riverbed temperature data across the entire channel. The riverbed near the left bank was highly dynamic thermally, transitioning between river and groundwater temperatures over daily hydropeaking cycles. In contrast, the rest of the riverbed, including near the right bank, was similar in temperature to the river and had relatively stable temperatures. Modeling showed that the temperatures near the banks are explained by advective heat transport driven by hydrostatic changes in river level, while the temperatures over the rest of the channel can be explained mostly by conductive heating. Gaining groundwater conditions and high sediment hydraulic conductivity favor thermally dynamic zones near banks, while low hydraulic conductivity (below 1 m/d) and neutral or losing groundwater conditions result in muted temperature fluctuations, as observed at the right bank.

Here we provide:
1) The river temperature and stage data during the field study.
2) The vertical profile riverbed temperature data from the 21 profilers with data from 10, 20, 30, and 50 cm depth in the riverbed.
3) The survey data of the profiler locations.
4) A COMSOL model file that has the features used for the modeling study. The user can change the dimensions of the river to meet their own interests and also change the subsurface flow and heat transport prosperities.

Subject Keywords

Deleting all keywords will set the resource sharing status to private.

Resource Level Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Lower Colorado River riverbed transect
Longitude
-97.6497°
Latitude
30.2136°

Temporal

Start Date:
End Date:

Content

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
National Science Foundation Collaborative Research: The effects of river regulation on lateral and integrated longitudinal mass and energy transfers in coupled terrestrial-aquatic systems EAR-1343861
National Science Foundation Collaborative Research: The effects of river regulation on lateral and integrated longitudinal mass and energy transfers in coupled terrestrial-aquatic systems EAR-1344547

How to Cite

Ferencz, S. (2021). Ferencz_et_al_2021_bedheat_data_and_modeling, HydroShare, http://www.hydroshare.org/resource/7f0c6b909fe04efca5889fd5cd432539

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
CC-BY

Comments

There are currently no comments

New Comment

required