Definition of water level rise refers to:

The definition of water level rise is best described by the idea that it is the opposite of land being left uncovered due to water retreating. When water levels rise, it typically means that more land becomes submerged by water, either due to natural phenomena such as melting ice caps, flooding, or the effects of climate change, which leads to a net loss of visible land area. This concept helps in understanding the environmental implications of water management, marine boundaries, and coastal regulations.

The correct understanding of water level rise is critical for geographers, surveyors, and urban planners, as it directly affects land use, property rights, and ecological systems. In contrast, the other options do not accurately encapsulate the phenomenon of water level rise and its implications. For example, the increase of land due to built-up materials relates more to land development rather than shifts in water levels, while reduction of land area due to water withdrawal focuses on the effects of human activity rather than natural water level changes. Similarly, determining ownership of land usually involves legal frameworks that are independent of water levels and their fluctuations.