[Telchar]

[img]smilies/smile.gif[/img] MUCHO IMPRESSO [img]smilies/smile.gif[/img]

Entry 5. and 31. might be a little far out - a dike is not obviosly a body of water???
but concerning dikes here are some more entrys:

Soon they came into well-tended fields and meadows: there were hedges and gates and dikes for drainage. Everything seemed quiet and peaceful, just an ordinary corner of the Shire.

‘I will!’ said he, and drove out of the gate. There was now no breath of wind stirring; the night was still and quiet, and a chill was in the air. They went without lights and took it slowly. After a mile or two the lane came to an end, crossing a deep dike, and climbing a short slope up on to the high-banked causeway.
Maggot got down and took a good look either way, north and south, but nothing could be seen in the darkness, and there was not a sound in the still air. Thin strands of river-mist were hanging above the dikes, and crawling over the fields.

The dark line they had seen was not a line of trees but a line of bushes growing on the edge of a deep dike with a steep wall on the further side. Tom said that it had once been the boundary of a kingdom, but a very long lime ago. He seemed to remember something sad about it, and would not say much.
They climbed down and out of the dike and through a gap in the wall, and then Tom turned due north,....

On that side, running in more than half a circle from the hill and back to it, there was a deep dike with a thick hedge on the inner side. Over this the Road crossed by a causeway; but where it pierced the hedge it was barred by a great gate.

NO MENTION OF WATER

Along the crest of the ridge the hobbits could see what looked to be the remains of green-grown walls and dikes, and in the clefts there still stood the ruins of old works of stone.

...and the heirs of Valandil removed and dwelt at Fornost on the high North Downs, and that now too is desolate. Men call it Deadmen’s Dike, and they fear to tread there.

...they were amazed at the change that had come over the Ents. It seemed now as sudden as the bursting of a flood that had long been held back by a dike.

‘I see a white stream that comes down from the snows,’ he said. ‘Where it issues from the shadow of the vale a green hill rises upon the east. A dike and mighty wall and thorny fence encircle it. Within there rise the roofs of houses; and in the midst, set upon a green terrace, there stands aloft a great hall of Men.

..and flowed then in a gully through the midst of a wide green gore, sloping gently down from Helm’s Gate to Helm’s Dike. Thence it fell into the Deeping-coomb..

‘Not far ahead now lies Helm’s Dike, an ancient trench and rampart scored across the coomb, two furlongs below Helm’s Gate. There we can turn and give battle.’
‘Nay, we are too few to defend the Dike,’ said Théoden. ‘It is a mile long or more, and the breach in it is wide.’

...winding through the gloom, converging towards the line of the broad road that led from the City-gate to Osgiliath.
‘The enemy,’ men murmured. ‘The dike is down. Here they come pouring through the breaches! And they carry torches, it seems. Where are our own folk?’

Now silently the host of Rohan moved forward into the field of Gondor, pouring in slowly but steadily, like the rising tide through breaches in a dike that men have thought secure.

(I love that sentence)

He turned Shadowfax off the Road, and the great horse leaped the green dike that here ran beside it; and then at a cry from Gandalf he was gone, racing towards the Barrow-downs like a wind from the North.