drainage map मीनिंग इन हिंदी

In the 1860s, when municipal engineers drew up the preliminary drainage maps for Philadelphia's, the conversion of many of the city's smaller streams into sewers became an integral part of the plan.
The basin lies between north latitudes 13?5'and 13?2'and east longitudes 79?0'and 80?7'and is located in the Survey of India topographic maps 57 O and 66 C on a scale of 1 : 250, 000 and 57 O / 7, 57 O / 10, 57 O / 11, 57 O / 15, 66 C / 3 and 66 C / 7 on a scale of 1 : 50, 000 . is a drainage map of the Arani river basin showing the characters of youth stage in the early course, mature stage in the middle course and old stage in the final course.