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Household Biosand Water Filters: Materials, Capacity, And Temperature Effects On Performance, Nathan B. Arnold
Household Biosand Water Filters: Materials, Capacity, And Temperature Effects On Performance, Nathan B. Arnold
Dissertations, Master's Theses and Master's Reports - Open
The household biosand filter (BSF) is one of the world’s most utilized point-of-use (POU) water treatment tools where drinking water is not reliably potable. The feasibility of using ferrocement for construction, the filter volume, and the effect of temperature on removal are unclear, however. The following field and laboratory research was carried out in Panama and at Michigan Technological University. Field testing of ferrocement biosand filters (FBSFs) in rural Panama yielded average coliform and E.coli removals that compared favorably to plastic and cement BSFs. Parallel testing of a larger-bodied FBSF and a conventionally-sized BSF revealed that the former is necessary …
Characterization Of Seismicity At Volcán Barú, Panama: May 2013 Through April 2014, Chet J. Hopp
Characterization Of Seismicity At Volcán Barú, Panama: May 2013 Through April 2014, Chet J. Hopp
Dissertations, Master's Theses and Master's Reports - Open
Volcán Barú, in the western province of Chiriquí, is Panama's youngest and most active volcano. Although Barú has experienced no historic eruptions there have been four eruptive episodes in the last 1600 years, the most recent occurring 400-500 years ago (Sherrod et al., 2007). In addition, there have been four reported earthquake swarms in the last 100 years. The most recent swarm occurred in May of 2006, prompting a USGS hazard assessment (Sherrod et al., 2007). In order to characterize local seismicity and provide a reference for future monitoring efforts, we established a seismic network that operated from May 2013 …