conservancy

n.

（自然物源的）保护，管理；

复数：conservancies

water conservancy水利；水资源保护

1. They spent months of toil on the water conservancy project.
   他们为这项水利工程辛辛苦苦地干了几个月。

From plant communities to landscapes in conservation inventories: A look at the nature conservancy (USA)
A scale-independent, site conservation planning framework in The Nature Conservancy
Adirondack Nature Conservancy: Why we got involved
Conservation Easements in Context: A Quantitative Analysis of Their Use by the Nature Conservancy
Research on the Expenditure on the Administration of River Conservancy during the Reign of Emperor Yongzheng
Application of New Modern Technology of Electronic Information in the Information Management Service of Water Conservancy
Weed Control Methods Handbook: Tools & Techniques ...
Major Vegetation Types of the Soutpansberg Conservancy and the Blouberg Nature Reserve, South Africa
Application of combined split water stop screw in water conservancy projects
Key points of standard construction technology for earth and rock works of water conservancy and hydropower projects