What type of stream water is controlled by the state for irrigation?

The correct choice focuses on ordinary flow and navigable streams as the types of stream waters that are controlled by the state for irrigation purposes. This control is rooted in the legal principles governing water rights and resource management.

Navigable streams are significant because they are utilized for commerce and transport, thus they fall under state control to ensure that the waterway remains navigable and accessible for public use. Ordinary flow refers to the stream water that is consistently present and available for various uses, including irrigation. The state regulates these water sources to manage and allocate them effectively, ensuring sustainable use for agricultural activities, especially in a climate where water scarcity may be an issue.

In contrast, flood waters and stagnant water are typically not under the same regulatory frameworks for irrigation, as their availability and usability can be unpredictable and inconsistent. Underlying aquifers and river systems also have specific regulations and management strategies different from surface waters, often addressing groundwater rights separately. This complexity shows the necessity for the state to manage certain water sources explicitly, particularly those vital for agricultural productivity. Hence, the focus on ordinary flow and navigable streams aligns with the legal and practical frameworks for irrigation water management.