By contour planting and contour ploughing, the speed of h2o runoff and therefore soil erosion is usually considerably reduced; this is especially vital in riparian zones. An isohyet or isohyetal line (from Historic Greek ὑετός (huetos) 'rain') is really a line on a map joining points of equal rainfall in https://contoursurveyindhaka06159.bloguerosa.com/31325002/contour-survey-an-overview