Start in one database such as Academic Search Ultimate, click on Choose Databases and add additional databases.
Web of Science Databases
Use WorldCat (the catalog) to locate books on your topic. Use keywords and then the same search strategies as for databases, only capitalize the connectors.
(rainwater OR "rain water" OR stormwater OR "storm water") AND harvest*
("public health" OR "human health") AND (recreation OR outdoors OR natur* OR environment*)
"ecosystem services" AND (economics OR marketing OR valu*)