Water flow has decreased in several basins, such as the Shullcas River in the Cordillera Huaytapallana in Peru, and is expected to decrease in the near future in places such as the Cordillera Blanca in Peru  . Disruptions in water flows will significantly degrade or eliminate high-elevation wetlands  . Impacts on wetlands are affecting the wild vicuña and the domesticated alpaca . New lakes represent a source of future hazards and water scarcity, as well as opportunities to serve as water reservoirs . The timing and extent of peak water due to glacier shrinkage is spatially highly variable and has passed for a large number of tropical Andes glaciers . Cities dependent on glacier melt have experienced high variability in domestic water supply , as shown in Case Study 2.7.3, but an increase in demand may also have an effect . Water provision is related to socioeconomic issues . Glacier retreat impacts Andean pastoralists , as shown in Case Study 2.6.5.4.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report