Hydratatieniveau

Hydratatieniveau is a Dutch term that denotes the degree to which a system contains water. In common usage it refers to the hydration status of a living organism, but the concept also applies to soils, building materials and other substances where moisture content matters. It reflects the balance between water intake or ingress and water losses or evaporation, and how water is distributed among compartments or phases.

In humans, hydration status is a dynamic health indicator. Objective measures include plasma osmolality and serum sodium, as well as urine specific gravity and urine osmolality. Body weight changes can indicate fluid shifts. A normal hydration state supports cellular function, circulation and temperature regulation; dehydration from insufficient intake or excessive losses can cause thirst, dry mouth, reduced skin turgor, dark urine and fatigue, and, in severe cases, confusion or shock. Overhydration can lead to hyponatremia and edema. Hydration needs vary with age, climate, activity and illness.

In non-biological contexts, the hydration level of materials and environments is the moisture content. For soils and construction materials, moisture content affects strength, volume and durability and can influence chemical reactions. It is typically measured by oven-drying (gravimetric method) or by moisture meters, and results are given as a percentage or as water activity. Managing hydration involves monitoring indicators and adjusting intake, environment or processing conditions to prevent dehydration or moisture-related problems.