The Mule Hole experimental watershed (4.1 km2) is located in the climatic semi-humid transition area and the mean annual rainfall is 1120 mm. The mean yearly temperature is 27 °C. On the basis of the aridity index defined as the ratio of mean annual precipitation to potential evapotranspiration, the climate regime can be classified as humid. Nevertheless, the climate is characterized by the occurrence of a marked dry season (around 5 months from December to April) and by recurrent droughts, depending on the monsoon rainfalls. The rainfall pattern is bimodal, as it is affected by both the South West Monsoon (June–September) and the North East Monsoon (October–December). Streams are ephemeral, and their flow duration ranges from a few hours to a few days after the storm events. The watershed is mostly undulating with gentle slopes and the elevation of the watershed ranges from 820 to 910 m above sea level. A detailed description can be found in this article.