一、水文学在非洲东部四个不同类型集水区进行的一系列短期的充分研究已经获得了若干重要的结论。根据对主要因素的直接测定已相当精确地判明了这些集水区的水文情况,从而能够测出土地用途改变后产生的影响,例如以针叶树代替天然竹类,以茶树代替高大雨林后 First, a series of short-term and adequate studies of hydrology conducted in four different types of catchments in eastern Africa have yielded several important conclusions. Hydrological conditions in these watersheds have been fairly accurately identified based on direct measurements of the main factors and thus can be used to measure the effects of land use changes such as the replacement of natural bamboo with conifers and the replacement of tall rainforests with tea trees