Dry well performance analysis : efficiency of stormwater capture and emerging contaminant removal
Abstract/Contents
- Abstract
- Dry wells are vadose zone infiltration wells that are deeper than their widest surface dimension. Dry wells are promising for urban stormwater capture and recharge because of their high infiltration capacity, low cost, and small footprint. However, little is known about how much stormwater can be captured by dry wells. Furthermore, since dry wells bypass the natural contaminant attenuation processes in topsoil, concerns have been raised about potential groundwater contamination by dry wells especially for hydrophilic organic compounds. This study applies field monitoring, mathematical modeling, and laboratory testing to address the abovementioned concerns about dry wells. In the first part of the study, a hydrologic model was constructed using Storm Water Management Model to estimate the stormwater capture efficiency of dry wells under various climate conditions and evaluate different dry well deployment strategies. In the second part of the study, four pilot-scale stormwater treatment systems [i.e., biochar-amended filters, regenerated activated carbon (RAC)-amended filters, UV/H2O2 + biochar-amended filters, UV/H2O2 + RAC-amended filters] were developed and their performance for removal of hydrophilic contaminants of emerging concern (CECs) was tested under high flow rates and continuous CEC dosing. The field lifespan of the developed systems was estimated for a demonstration case study in a Los Angeles neighborhood using a contaminant transport model. Results from this work show that dry wells can be configured to capture about 20% of annual rainfall in Southern California. However, this efficiency will decrease because of climate change and thus better deployment strategies need to be employed. UV light coupled with black carbon-amended filters are cost-effective stormwater treatment systems for the removal of hydrophilic CECs in dry wells. Adopting these systems in dry wells can effectively increase public acceptance for stormwater capture and facilitate future deployment of dry wells.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2024; ©2024 |
| Publication date | 2024; 2024 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Li, Yiran, 1995- |
|---|---|
| Degree supervisor | Luthy, Richard G |
| Thesis advisor | Luthy, Richard G |
| Thesis advisor | Fendorf, Scott |
| Thesis advisor | Fletcher, Sarah (Sarah Marie) |
| Degree committee member | Fendorf, Scott |
| Degree committee member | Fletcher, Sarah (Sarah Marie) |
| Associated with | Stanford University, School of Engineering |
| Associated with | Stanford University, Civil & Environmental Engineering Department |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Yiran Li. |
|---|---|
| Note | Submitted to the Civil & Environmental Engineering Department. |
| Thesis | Thesis Ph.D. Stanford University 2024. |
| Location | https://purl.stanford.edu/hh187vc2973 |
Access conditions
- Copyright
- © 2024 by Yiran Li
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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