Groundwater commonly collects in stream drainages but may remain entirely beneath the surface of drystream-beds in arid regions.
地下水通常聚集在河流流域，但在干旱地区，地下水也可能完全保留在干涸河床的表面之下。
2
In particularly wet years, short stretches of an otherwise drystream-bed may have flowing water because the water table rises to intersect the land surface.
在气候特别湿润的年月里，平常干涸的河床下游可能会有水流动，因为地下水在那里位抬升到了地表以上。
3
Underground water resources, or oases, sufficient to support irrigated agriculture are found in drystream beds and depressions.