Mae'r ddau air yn golygu'n un peth, mae'n debyg, felly 'dalgylch' amdani.
----- Original Message -----
From: Berwyn Jones
To: [log in to unmask]
Sent: Monday, October 11, 2004 10:21 AM
Subject: Re: watershed
Dalgylch? Neu a yw'n fwy na 'catchment area'?
Berwyn
----- Original Message -----
From: Pennawd Cyf.
To: Berwyn Prys Jones
Sent: Monday, October 11, 2004 10:26 AM
Subject: watershed
Nid 'cefn deuddwr' na 'gwahanfa ddwr', ond yr holl dir mae'r dwr oddi arno ac oddi tano yn draenio i afon neu lyn neu gorff dwr arall.
Diffiniadau o'r We:
"The specific land area that drains water into a river system or other body of water. "
"..all the land that serves as a drainage for a specific stream or river. In urban watershed management, a watershed is seen as all the land which contributes runoff to a particular water body..."
A oes term cydnabyddedig?
