# Water Resource System Modeling? To understand how a water system performs today and to evaluate the impacts of future changes, planners build water resource system models. Water resources systems can be small, like a city and its water supply sources, or large, like a country with many different rivers, water infrastructure assets and water users. Whether you're trying to evaluate the reliability of current sources, or evaluating new interventions under plausible future conditions, such a computer model helps track water throughout the system (spatially) and over time. Given data on hydrological flows and climate, water demands and use, and water management rules and allocation, a water system model outputs water flows and volumes at each modeled location and time-step. When these results are aggregated, they provide an accurate picture of how different water interventions (changes to water policies or infrastructure) might perform. {% embed url="" %} What is a water resource system model? {% endembed %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://water-strategy.gitbook.io/waterstrategy/modeling-basics/water-resource-system-modeling.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.