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Los regímenes de humedad del suelo bajo diferentes usos del suelo fueron observados y modelados en una cuenca forestal modelo en el Prepirineo meridional Catalán, específicamente en la cuenca de la Ribera Salada (222.5 km2). La vegetación presente en la cuenca consiste en pasturas, cultivos y bosques. Un número representativo de parcelas experimentales por cada uso del suelo fueron monitoreados de forma intensiva durante el periodo estudiado. La precipitación anual fluctúa entre 516 y 753 mm, mientras el contenido de humedad del suelo oscila entre 14 y 26% en la parte baja y media de la Cuenca y entre 21 y 48% para zonas de umbría cerca de las riberas, y en las partes altas de la cuenca. La humedad del suelo y las lluvias están controladas en primer lugar por la altitud, con la existencia de dos pisos climáticos en la cuenca (sub-Mediterrano y sub-alpino), y además por los usos del suelo. Dos modelos fueron implementados para estimar los regímenes de humedad del suelo: El Modelo de Simulación Jarauta (JSM) y el Modelo de Simulación Newhall (NSM) encontrando que pueden predecir los regímenes de humedad del suelo en la cuenca para diferentes combinaciones de factores bióticos y abióticos a escala local. Los resultados usando JSM son más precisos que los obtenidos mediante el modelo mas usado, concretamente NSM, el cual ha sido específicamente desarrollado para la simulación de los regímenes de humedad del suelo. El NSM tiende a sobre estimar los regímenes de humedad del suelo, tendiendo hacia regímenes húmedos. Los resultados muestran la importancia de la profundidad de la sección control del suelo y la capacidad de retención de humedad del suelo, en el estado y variabilidad de la sección control de humedad del suelo. Los suelos en zonas de montaña mediterránea están dominados por regímenes ústicos y excepcionalmente xéricos. Los cambios en los usos del suelo están direccionados hacia un incremento de las áreas forestales lo cual implica una disminución en la humedad del suelo. Estos efectos son más evidentes en suelos superficiales degradados y pedregosos con baja retención de humedad.
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