Events

Civil and Environmental Engineering Undergraduate Honors Thesis Defense: Amory Cervarich
Thursday, June 14, 2018 - 11:30am

The Department of Civil and Environmental Engineering is pleased to announce Amory Cervarich's Undergraduate Honors Thesis Defense: "Precipitation Impacts on Groundwater Levels in the Ephemeral Holgate Lake: A MODFLOW Inquiry."

Date: Thursday, June 14, 2018
Time: 11:30am
Location: Engineering Building 202L (CEE Conference Room)
Adviser: Dr. Gywnn Johnson

Holgate Lake, an ephemeral lake located in southeast Portland, has a history of flooding and inundating residential areas. The appearance of the lake is hypothesized to be a function of precipitation-driven changes in groundwater levels. A model was developed using MODFLOW-NWT, a USGS modular hydrologic program, to analyze parameters contributing to the appearance of the lake. The model was most sensitive to changes in aquifer properties including hydraulic conductivity and storativity. The model displayed low sensitivity to changes in precipitation, evapotranspiration, and conductance of surface waters. Results from the analysis contribute to a better understanding of the surface-groundwater system, and could be used to assess flooding risks in the Holgate Lake area.