What is Stream: Definition and 174 Discussions

A stream is a body of water with surface water flowing within the bed and banks of a channel. The flow of a stream is controlled by three inputs – surface water, subsurface water and groundwater. The surface and subsurface water are highly variable between periods of rainfall. Groundwater, on the other hand, has a relatively constant input and is controlled more by long-term patterns of precipitation. The stream encompasses surface, subsurface and groundwater fluxes that respond to geological, geomorphological, hydrological and biotic controls.Depending on its location or certain characteristics, a stream may be referred to by a variety of local or regional names. Long large streams are usually called rivers.
Streams are important as conduits in the water cycle, instruments in groundwater recharge, and corridors for fish and wildlife migration. The biological habitat in the immediate vicinity of a stream is called a riparian zone. Given the status of the ongoing Holocene extinction, streams play an important corridor role in connecting fragmented habitats and thus in conserving biodiversity. The study of streams and waterways in general is known as surface hydrology and is a core element of environmental geography.

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  1. B

    Momentum and Stream of Pellets

    Not really homework but doing all problems in the book this one just stumped me... Homework Statement A pellet gun finers ten 2.14-g pellets per second with a speed of 483 m/s. The pellets are stopped by a rigid wall (a) Find the momentum of each pellet. (b) Calculate the average force...
  2. P

    Vertical flow rate of water stream under gravitation

    Hi, I'm trying to get the rig for my physics project set up which requires some constant water flow through the system. Unfortunately it's requiring a bit more water inflow than the tap can provide. I measured the tap's flow rate to be somewhere around 0.1L/sec to 0.3L/sec Now because I...
  3. 6

    Position of line vortex from Stream function

    Homework Statement So, the problem is 4 line vortices in a 2-d square. All have the same strength. I am asked to find the motion of the vortices in the flow of the others. Meaning, each vortex moves in the flow of the other three. I know the correct solution should be just a circular...
  4. T

    Question involving a stream of fluids

    When a stream falls from a fosset it thins out near the bottom. Why is that? This eems to apply to any falling fluid.
  5. P

    Max Height Attained by Water Stream in P9.81 Tank

    Homework Statement Figure P9.81 shows a water tank with a valve at the bottom. If this valve is opened, what is the maximum height attained by the water stream coming out of the right side of the tank? Assume that h = 8.0 m, L = 1.50 m, and = 30° and that the cross-sectional area at A is very...
  6. A

    One question about stream function in fluid mechanics

    Hi... Suppose we consider a circular cylinder moving with constant velocity U in x-direction in a two-dimensional unbounded, irrotional, incompressible, inviscid fluid. If the motion of the fluid is completely resulted from the motion of the body, we know the velocity field of fluid can be...
  7. A

    One question about stream function in fluid mechanics

    Hi... Suppose we consider a circular cylinder moving with constant velocity U in x-direction in a two-dimensional unbounded, irrotional, incompressible, inviscid fluid. If the motion of the fluid is completely resulted from the motion of the body, we know the velocity field of fluid can be...
  8. W

    Calculating Distance from Water Level to Stream Impact Point

    A tank is filled with water to a height H, 26 m. A hole is punched in one of the walls at a depth h = 6.50 m below the water surface (see the figure). What is the distance x from the base of the tank to the point at which the resulting stream strikes the floor? i knoe the equation to find out...
  9. F

    Stream Function: 2D Notation Explained

    I'm having some trouble trying to decihper the notation used for the stream function in two dimensions. Say we have a velocity field: \vec V(x,y) The fluid is incompressible, thus Laplaces equation must be satisfied. \nabla^2 u = 0 Where: u = \Nabla \vec V Thus: u_x = V_1...
  10. E

    Creating an Income Stream with a PF-Type Website

    do they make money? how much money can one make by having a website like pf?
  11. marcus

    Evidence of slowing gulf stream

    http://news.yahoo.com/s/nm/20051130/sc_nm/environment_ocean_dc ---sample quote--- ... ...If the 30 percent slowdown seen over the past 12 years is not just a blip, temperatures in northern Europe could drop significantly, despite global warming, they added. Scientists have long...
  12. J

    Calculating Velocity of Water Stream for Archer Fish Target Practice

    This problem seems to confuse me! If someone helps me with this problem I'll be so grateful! An Archer fish shoots at a target 2m away, at an angle of 30 degrees above the horizontal. With what velocity must the water stream be launched if it is not to drop mote than 3cm vertically on its...
  13. wolram

    Mainstream Cosmology: Know Your Ass from Your Elbow

    cosmology, read all the papers in the arxiv, and tell me if you know your ass from your elbow.
  14. S

    3 dimensional stream function

    hi does anyone know the equation for a 3-dimensional stream function? for a 2 dimensional case, u=d(stream function)/dy and v=-d(stream function)/dx.. so does anyone knows how to express u, v and w in terms of the stream function for a 3-dimensional case... thanks. stan
  15. T

    Magnetic fields and a stream of protons

    I have tried everything to solve this problem, and I just cannot come to a conclusion. If anyone finds it comes easy to them, help will be greatly appreciated. :) Here goes: A straight stream of protons passes a given point in space at a rate of 1.5x10^9 protons/s. What magnetic field do...
  16. K

    Theoretical/Experimental stream?

    A few months later, I will have a choice between "theoretical physics stream" and "applied physics stream". but i don't know which one is more suitable for me. In high school, I would definitely choose theoretical stream coz I hated doing experiment so much. But after one semester in...
  17. P

    Solving Water Stream Problem: Height of Wall Impacted

    a stream of water exits from the nozzle of a hose at a speed of 16m/s. the vertical wall of a burning building is a horizontal distance D=4.0 m away from the nozzle. I understand and got the correct answers for the first two questions, but i need help on the third question. 1.) if the nozzle...
  18. Clausius2

    Fuel injector surrounded by a coaxial air stream

    Maybe you, chemical people could answer my question. Imagine a fuel injector surrounded by a coaxial air stream. The fuel and air flow are parallel, coaxial and axisymmetric. Both fluids obey ideal gas equation. Let's consider steady and compressible flow, i.e, variations of \rho are...
  19. E

    How Does the Diameter of a Water Stream Change as It Falls?

    The stream of water from a faucet decreases in diameter as it falls. Derive an equation for the diameter of the stream as a function of the distance y below the faucet, given that the water has speed v0 when it leaves the faucet, whose diameter is D. The water molecules in contact with the...
  20. T

    Which engineering stream is best?

    I am going to pursue Engineering at graduation level. But I'm confused about which type of engineering is best. I have three options: 1) BioTechnology 2) Instrumentation and control 3) Information Technology All are equally interesting to me. Please help me decide which one has the best...
  21. J

    How will a stream of photon (being light) looks like?

    I know this sounds stupid but I still find it hard to digress QM. Could anyone give me a picture of how a photon is like? And how will a stream of photon (being light) looks like? At least an approximation, if possible.
  22. Ivan Seeking

    Gulf Stream Troubles: What Global Warming Means for Us

    http://willmar.ridgewater.mnscu.edu/library/397731.htm
  23. T

    What is Light? Is it a EM wave or a stream of photons?

    What is Light? What is Light? Is it a EM wave or a stream of photons? Is there any theory which can explain all the phenomena of light? P.S.: Another question, What makes glass transparent?
  24. C

    How does an electron gun shoot a stream of electrons?

    Electricity is the movement of electrons from attom to atom but how are streams of electrons shot through the air to hit a phosphor screen in a TV or monitor by an electron gun? I have heard of electrical arc's but when those are preformed there are usually sparks going every where so I know it...
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