Comparing Sketches to Design Specifications

#1 Compare each sketch to the design specifications.

Plan 1: This design might not be very useful because of the dirt hole. When all the excrement piles up in the ground hole, it slowly decomposes. But where does it go? It goes to the groundwater. That might even make the contamination of the water much bigger. Also, the ground hole takes alot of space, and it might be a problem to dig by hand. To get an excavator up the ger district might be another problem.

Plan 2: The second design includes the excrement entering the local river. This might not be a good idea because it might take too many pipes to lead all of the waste to the river. Although leading the excrement to the river, which in any case is not being drunk from, might be a better idea.

Plan 3: The third design involves the excrement piling up in a closed septic tank and later, fertilizing the crop fields. This idea might be more expensive because of the septic tank. But this is more useful than the other ideas. The excrement does not go into the groundwater because it is below the crop fields in the ground. The extra excrement is kept in the septic tank until needed. This idea is the most useful.