13.-1256. Rehabilitate, operate and transfer.

Watsan matters
13.-1255. Regolith.
13.-1254. Refuse.
13.-1253. Refugee.
13.-1252. Refrigerator.
13.-1251. Recycling - ( formal ).
13.-1250. Recycled water.
13.-1249. Recovery phase.
13.-1248. Recovery in the context of DRR.
13.-1247. Recontamination.
13.-1246. Reclaimed water.
13.-1245. Reclaimed wastewater.
13.-1244. Reciprocating engine.
13.-1243. Recharge.
13.-1242. Recharge wells.
13.-1241. Recharge area.
13.-1240. Reactor.
13.-1239. Reactive oxygen species.
13.-1238. Reach.
13.-1237. Rating curve.
13.-1236. Rapid sand filtration.
13.-1235. Rapid sand filter.
13.-1234. Rapid gravity filters.
13.-1233. Raised latrine.
13.-1232. Rainwater.
13.-1231. Rainwater harvesting.
13.-1230. Rainwater harvesting raised surface collection.
13.-1229. Rainwater harvesting ground surface collection.
13.-1228. Rainfall patterns.
13.-1227. Radioactive waste.