Climate change can affect hydrological services in Andean basins, so a possible reduction in water supply can lead to not meeting the needs of different users, which has become a real challenge for decision-makers with regards to water management. This paper presents the results obtained from hydrological modeling exercises in the Gualí River Basin (Colombia) by combining the Hydro-BID modeling tool, which consists of an analytical hydrology database for Latin America and the Caribbean that provides a great advantage for countries with limited information and the Water Evaluation and Planning System (WEAP) modeling tool, in order to determine the potential impacts of climate change on unsatisfied demand for water in the basin. The results show a possible decrease in flow compared to current conditions; between 5.8% and 9.56% for CPR 2.6, and between 2.18% and 6.86% for CPR 8.5. The approach presented is useful to ensure that timely decisions are made to meet the demands of users under the conditions of climate change.

气候变化会影响安第斯河流域的水文服务，因此可能的水供应减少可能导致无法满足不同用户的需求，这已成为决策者在水管理方面的真正挑战。本文介绍了通过结合Hydro-BID建模工具在加利河流域（哥伦比亚）进行的水文建模练习而获得的结果，该工具由拉丁美洲和加勒比海地区的分析水文数据库组成，为信息有限的国家提供了巨大的优势以及水评估与计划系统（WEAP）建模工具，以确定气候变化对流域内未满足的用水需求的潜在影响。结果表明与当前条件相比流量可能减少；CPR 2.6介于5.8％和9.56％之间，而CPR 8.5为2.18％至6.86％。提出的方法有助于确保在气候变化条件下及时做出决定以满足用户的需求。