Engineering Commons^™

Longitudinal Thermal And Solute Dynamics In Regulated Rivers, Muhammad Rezaul Haider

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Dam releases increase river stage and can reverse groundwater movement into and out of the river. As the flood, thermal, and solute waves travel downstream in a regulated river, the size of the waves is anticipated to be affected both by river processes and exchanges with near river groundwater. This study established a modeling framework to quantify the influences of the groundwater exchanges on the temperatures and solute concentration dynamics along regulated rivers. The wave properties, volume of exchanges, conservative solute mass exchanges, and heat energy exchanges were calculated as a function of time and distance downstream. Results show that …

Determining Natural Frequencies Using Embedded And Placed Sensors Under Ambient And Shaker Excitation, Tyson Scott Alder

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Structural Health Monitoring (SHM) includes methods of detecting damage to structures over their lifespan. Using the structure’s dynamic characteristics, internal damage and other changes can be detected and defined. Dynamic characteristics are affected by many operational parameters, particularly temperature effects. By defining the operational condition of a healthy structure, changes from the baseline condition can be detected and defined as damage. Defining the operational characteristics of the structure are imperative to detecting damage.

This study focused on defining the baseline dynamic properties of the recently constructed Nibley Bridge using embedded sensors. Multiple tests were performed to provide a range of …