what does it mean when a river "crests"?
612533
it is at its highest point during a storm.it creasts then starts going back down.
183244
Flowing water does.  I don't know about standing water.
178438
If I've translated your writing, you're asking about tides at the mouth of the Columbia River????\n\nYes, there are tides not only at the mouth of the Columbia River, but as far inland as Portland, Oregon. I know this because I live there.
821548
Delta\nA delta is a landform where the mouth of a river flows into an ocean, sea, desert, estuary or lake, building outwards (as a deltaic deposit) from sediment carried by the river and deposited as the water current is dissipated. Deltaic deposits of larger, heavily-laden rivers are characterized by the river channel dividing into multiple streams (distributaries), these divide and come together again to form a maze of active and inactive channels\n\n Estuaries\nEstuaries are aggrading depositional sedimentary bodies at the mouths of rivers. Many present river mouths became estuaries after the post-glacial sea-level rise inundated the former deltas. When that happened, fluvial channels became subject to tidal influence. Especially in meso- and macro-tidal regimes, the fluvial processes became subordinate to marine redistribution and tide-dominated estuaries could form.
450525
It rains\nthe rain collects and then either:\n\nsoaks into the ground and comes out later\nflows into a river then the sea\n\nAt some point it evaporates and forms clouds\n\nthen it rains...\n\nsee above!
149401
when it rains, it pours.\n\nHope you don't live on/near a hillside.
553833
From the River's Mouth
1058208
definitely not true. it just appears that way because it hits the water and disperses before you can really notice it but if you watch its there.
840807
If you mean river rapids: water traveling from a higher to a lower elevation over obstacles.  The obstacles cause turbulence in the water called rapids.  Variables are: water volume; rate of elevation drop; size/number of obstacles.
635600
That would be a natural levee.\n\nWhen the river's water exceeds its banks, the water begins to slow down.\n\nThe slower velocity will cause the heaviest of the sediments to "fall out".\n\nSome of the sediment will be deposited on the banks of the river forming a natural levee.
313031
a deep ravine (usually with a river running through it) \ndefile: a narrow pass (especially one between mountains)
161011
River morphology (shape) is controlled by a number of characteristics. River channels can be broken into three types, straight rivers, single channel meandering rivers, and braided rivers (multi-channel). The amount and size of the sediment the river carries, the slope of the river channel, and the amount of water in the river determine the shape of the river channel. \n\nStraight rivers tend to have the lowest sediment load and the lowest slope. Meandering rivers have slightly more slope, and much more sediment load, and braided rivers have both the highest slopes and greatest sediment loads. \n\nRiver channels in cross section often have a cup-like  shape with the deepest portion, known as the thalweg, found on one side or the other. This thalweg has the highest flow velocity and because it flows faster it can cut into the bank it is closest to, while the shallow part of the river slows down and drops sediment. This action causes both meandering rivers and braided rivers to move their channels from side to side in a valley over time. Straight channel rivers also have thalwegs that move but the effect is much less. \n\nAs rivers go from mountainous terrain to nearly flat valleys they change from braided streams and rivers to meandering rivers. As they approach sea level they form deltas where the flow often separates into separate branching channels. A great deal of the sediment load of the river is deposited on the delta, and as the river flows into the ocean it builds the delta outward. Rivers like the Mississippi have built deltas far out into the ocean with sediment piles that are several miles deep.
488307
A valley created by the ancient flow of a river.  As the rived flowed it eroded and dug the valley over time.
816507
A hydrograph shows the flow in a stream over time.  The shape might be described as "peak and trough" line graph.  Here's a quick website to look at for an example of a hydrograph:\n\nhttp://mrbdc.mnsu.edu/major/midminn/subshed/sevenmi/vtour/hydrograph.html
691491
When the river enters the sea carrying with it a lot of water,  many minerals and chemicals dissolved in it, a large amount of gravel and sand are deposited in the course of the river. The  river spreads into a vast area and and its velocity and force is reduced and a large amount of sand is deposited in the  estuary.  With the accumulation of the sand and the minerals the height of the shore is raised and the river is prevented from entering the sea and stagnates. With the weight of more and more deposits of sand and other particles sediments are formed and block the entrance to sea.
931239
They are the opposite ends of the river--the mouth is where the river empties into another body of water; the source is the headwaters, or the little streams that feed into the river. The outlet is the same as the mouth.
737868
hahahaha, that's not soccer, that's climatology!!!!\nIt means "Floods in the Segura river basin"\n\nask in that category  ;-)