Water table
Tebur na ruwa shine saman saman yankin phreatic ko yankin jikewa. Yankin jikewa shine inda ramuka da karaya na ƙasa ke cike da ruwan ƙasa, wanda zai iya zama sabo, saline, ko brackish, dangane da wurin. Hakanan za'a iya bayyana shi kawai azaman zurfin ƙasa wanda ƙasa ta cika.[1] Yankin da ke sama da teburin ruwa shine yankin vadose. Ana iya ganinsa a matsayin "surface" na kayan da ke ƙarƙashin ƙasa waɗanda ke cike da ruwan ƙasa a wani wurin da aka ba su.[2]