Hi, friends!
I've gotten some requests to talk about the engineering work I'm doing while I'm here - which sounds perfectly reasonable to me. I've been trying to distil all my responsibilities, and to be honest with you, it just doesn't make for exciting reading. So instead, I will take you through some of the stuff I did today.
Our workday starts at 8. After turning on my computer, and talking with Phil (my officemate and mentor) while my computer starts up, I check my e-mail and organize my to-do list.
At 8:30 we have an office devotion. Everyone in the office gathers in our central meeting room, and depending on the day, it might be a Bible study (we're about to embark on the book of Ezra), a description from three staff members of what they do, a discussion that the leadership wants to have with everyone (today, we reviewed the last quarterly update to come out of the global office) or, on Fridays, a worship service with MAF,* with whom we share our office. Wednesdays we pair up and pray with each other.
Today, I spent a good part of my morning finishing up the second draft of the report for my project. All of our volunteers have written sections relating to their areas of expertise, and to what they did on the project trip two months ago, and I have been compiling them into one document, editing, asking questions, and adding appendices. My graduate education is actually very useful for this part of my work! So I think I was adding sections about well siting and turfgrass this morning.
One of the most critical things to come out of the report is a land-use plan for the campus:
This is how we are envisioning the 332 acres of land that Hope Alive! owns. (Actually, it's one option - we have another one in the works, which has more concentrated development). For scale, the property is probably about 1.5km from the top-left to the bottom-right (or, it's more than three times the size of the UR River Campus). All credit to this goes to the architects and the agricultural team :)
One of my primary roles as regards this plan has been siting the boreholes that will provide water to the campus. This is an important thing to consider early on, because they cannot be very close to each other, or to the property boundary, or to any wastewater sources. I made a picture with a 50m buffer around the property boundary and any buildings I thought might generate wastewater, and used it to site the five boreholes we estimate that we will need. However, I got the scale wrong, and my picture ended up being very restrictive. Today, I finally fixed the scale and was able to re-site my boreholes.
This was actually super exciting for me, because I got to move one of the boreholes to a much higher location. We want to put storage at each well location, for security reasons, and we also want to tie all of the storage tanks together so that the entire site is serviced by one connected water main. There are some good reasons to do this, such as better water quality (the water is less likely to sit stagnant in the pipes) and more redundancy if one pump fails. However, it means that all of the tanks have to be at the same elevation. Therefore, boreholes at low elevations require super-tall tank stands, which are expensive. Today's exercise allowed me to reduce the tallest stand from 11 meters to 8.5 meters (I asked Phil, a structural engineer, if an 11 meter stand was okay, and he laughed at me).
To actually figure out how tall the stands need to be, though, you have to model the distribution system. We have a neat program called EPAnet 2 that lets you sketch out the proposed system, with tanks, pumps, pipes, junctions, and demand nodes. You can then simulate the flow of water through the system. Since we have a gravity-fed system (no pressurizing pumps), we are particularly concerned that each building has sufficient pressure to operate at peak demand. Therefore, I had to change the elevation of my tanks until they were high enough to provide good pressure everywhere in the system under the worst-case scenario. That's what's displayed in the picture below:
One of the other people from the project team wanted to look at the model and make some suggestions (she has much more experience with this than I do), so I spent some time this evening wading through my models and making sure I had given her the right ones.
Also today, I spent some mentoring time with Phil. We're allowed to count up to 2 hours per week of this toward our work requirement - eMi holds discipleship as one of its core goals, and this is one very tangible way they back it up. Afterwards, I met with our staff civil engineer to talk about the eMi East Africa Civil Engineering Design Guide, which I am doing some work on. We talked about precipitation data, wetlands, and water law, among other things. Finally, I went back through the architectural program (read: the list of all the rooms in all the buildings that we're planning for on the site) and updated my water demand calculations. This was primarily because I allocated water for building cleaning based on floor space, but hadn't updated it to the most recent numbers. (No picture for this - it was all excel spreadsheets).
There you have it! To be honest, this was a kind of exciting day for me - I spent yesterday entirely on the report. But that's the way work is, even here at eMi - there are some exciting days and some less-exciting ones. But by and large I am very happy with the work that I get to participate in here - both in terms of what I do, and in terms of what it's for. God has certainly blessed me in my professional life here.
*http://www.mafint.org/