Peru's President Alan García has opened the 31mn-sol (US$11.3mn) Sambor Huaypo irrigation project in Cuzco region, the presidential website reported.
Work involved building four dams with capacity to store a total 6.7Mm3 of water.
Other works included building two inverted siphons spanning 1.3km, lining 12.7km of the main irrigation canal, and 3.6km of the secondary canal, as well as repairing three water intakes and installing a sprinkler system to benefit 1,105ha.
The initiative will irrigate 2,495ha of land in districts Anta, Huarocondo and Zurite, at an altitude of 3,500m above sea level.
Unesco will take on a project to develop the Masacre river basin, which forms the northernmost part of the border between the Dominican Republic and Haiti.
The project was approved at Unesco's IX national committees and focal points meeting for Latin America and the Caribbean, held in the Dominican Republic's San Pedro de Macorís province, the presidential website reported.
The Masacre river, also known as the Dajabón river, has seen its water levels drop significantly in the last few years due to overuse of its resources, deforestation and the unregulated removal of sand from the riverbed.
And in Argentina, Santa Fe province's water, public services and environment ministry has greenlighted an agreement to expand the Totoras-Salto Grande stretch of the Centro Oeste potable water pipeline.
First-stage work is budgeted at 8.24mn (US$2mn) and will be carried out over 12 months by Werk Construcciones, the local government reported.
Work involves installing 13.5km of new pipeline, and building a water tank in town Salto Grande, a pumping station in Totoras city, and a control system.
The project will extend potable water connections to eight neighborhoods, benefiting 2,000 people.