Diolch o galon, dwi’n teimlo mod i’n
hedfan rwan a gallaf ail-ddechrau
From:
Sent: 14 August 2008 09:35
To:
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Subject: ATB: sediment budgets
Gorwel, ry'n ni wedi defnyddio 'mantolen
maetholion' am 'nutrient budget' - ym maes amaethyddiaeth - sef
cymharu'r maetholion a ychanegir at y tir a'r maetholion a ddefnyddir
gan gnydau neu a olchir allan o'r pridd gan law.
Oddi wrth/From:
Anfonwyd/Sent: 14 Awst 2008 09:13
At/To:
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Pwnc/Subject: sediment budgets
Pwysigrwydd: Uchel
Oes rhywun wedi gweld term Cymraeg am
‘sediment budget’ os gwelwch yn dda? Cydbwysedd y gwaddodion?
“Sediment budget is a concept that applies to sandy and muddy shores. It is only one of three factors (sediment budget, sea level and wave energy) that control most land loss. Sediment budget refers to the balance between sediment added to and removed from the coastal system; in this respect the coastal sediment budget is like a bank account. When more material is added than is removed, there is a surplus of sediment and the shore builds seaward. On the other hand, when more material is removed than is added, there is a deficit in sediment supply and the shore retreats landward. Coastal erosion is a physical expression of a deficit in the sediment budget where nearshore processes remove more material from the shore than is added. Stated another way, coastal recession is the result of insufficient sediment supply compared to sediment removal.”