Its extra-long roots make the soil more absorbent, which means more rain could be soaked up on higher ground.
Winds in the area reached speeds of more than 50mph on Saturday night.
Coastal and flood-prone communities across Wales are preparing themselves for another battering from the weather this weekend
The Welsh town of Aberystwyth saw some large waves at high tide this morning, but was spared the dramatic scenes of the last few months when sand and pebbles spilled over the promenade and pelted the waterfront homes.
Arriva Trains Wales says buses are replacing rail services between Porth and Pontypridd due to flooding.
Owing to flooding between Porth and Pontypridd all lines are blocked. Replacement buses are conveying passengers until further notice.
February begins with more stormy weather as yet another deep depression brings very unsettled weather to Wales. It comes just a few weeks after much of the Welsh coastline took a battering from previous storms.
A number of factors are set to combine to bring a flood risk that could match the flood damage caused by January's big storm. Saturday sees large spring tides which are set to peak after 8am.
The depression approaching Northern Ireland is expected to add to these spring tides with an additional Atlantic surge. Added to this is the strong gusty winds that will drive large waves onshore adding to the risk that seawater will breach already weakened or damaged flood defences.
Flood risks could be increased further as Friday's rain makes it's way to the sea on river systems meeting the incoming tide.
Natural Resources Wales say this combination of factors will lead to flood warnings, the second level of alert, being issued for all coastal areas of Wales on Saturday.
Aberystwyth University has cancelled all teaching activities today and again on Monday, as more high tides and strong winds are forecast.
The University has warned students that the new band of stormy weather is likely to make the Promenade area a 'hazardous place' this weekend.
Seafront University Residences will close at 4pm today and students have been asked to inform the University of their planned whereabouts over the weekend.
The manager of the Nag's Head in Aberystwyth hopes to raise thousands of pounds in donations for Macmillan Cancer Support by wearing a onesie every day for a year. Chris Kiff says he will not return to his normal shirt and trousers until January 2015.
– Chris Kiff
"I'm walking around in an adult babygro. It's completely against what I would normally wear.
"But I've had friends and family who had to deal with cancer. I think the people at Macmillan are just great.
"And I wanted to do something to help that was a bit of fun.
"When I think of Macmillan, I think of comfort and support - and what could be more comfortable than a onesie?"
Chris said his collection was growing. "People are donating them, I've bought a few more, I've borrowed some," he said.
"Maybe I'll auction them off when I've finished."
A pub manager from Aberystwyth plans to wear a onesie every day for a year to raise money for MacMillan Cancer Support.
Chris Kiff, who is nearly 6ft tall, says he will not return to his normal shirt and trousers until January 2015.
A large crack has opened up alongside the Monmouthshire & Brecon Canal due to bad weather.
Rain had made the bank unstable. The canal has been closed between Govilon and Llanfoist while repairs are being carried out.
The clear-up and repair costs in Aberystwyth after recent storms are expected to exceed £1.5 million, according to Ceredigion County Council.
"The final figure could well exceed this estimated sum", a spokesperson added.