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Topic: Hyetograph

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	Journal of the American Water Resources Association: A triangular model of dimensionless runoff producing rainfall ... (Site not responding. Last check: 2007-10-15)
		Triangular hyetograph models are fit to the mean values for the dimensionless cumulative hyetographs from more than 1,600 storms known to produce runoff on 91 small watersheds in Texas.
		Because no substantial relation between the mean of the hyetograph distribution and the storm magnitude as measured by the total storm depth is apparent, and because storm depth is a function of storm frequency level (return period), the authors conclude that the hyetographs suggested here are independent of the frequency level.
		Another implication of the non-SCS hyetographs is that unit hydrograph derived peak streamflow is expected to be less because the peak rainfall intensity is less than the peak rainfall intensity exhibited by either of the SCS hyetographs.
	www.findarticles.com /p/articles/mi_qa4038/is_200308/ai_n9242061/pg_4 (989 words)

	Nashmodel.html
		Transform the rainfall hyetograph matrix from units of intensity (cm/h) to units of flux (m3/s).
		Compute prediction of the hydrograph that would be observed for the given rainfall hyetograph, using the UH of the Cascade of Linear Reservoirs model.
		Compute prediction of the hydrograph that would be observed for the given rainfall hyetograph, using the UH of the Linear Channel-Linear Reservoir model.
	www.engr.colostate.edu /~ramirez/ce_old/classes/ce522_ramirez/Nashmodel1.html (390 words)

	[No title] (Site not responding. Last check: 2007-10-15)
		The triangular design hyetograph method is developed as a practical method to provide the local storm hyetograph for design of highway storm drainage facilities.
		The method is based on the methods of moments, using and preserving the statistical mean of the first time moment of rainstorms.
		It briefly describes the background and objectives of the research project, the methodology and procedure of the first-moment triangular design hyetograph method, and results of statistical analysis of the rainfall data.
	ma.water.usgs.gov /FHWA/abstracts/fhwa78.htm (220 words)

	Hydraulic Design Manual (Site not responding. Last check: 2007-10-15)
		A rainfall hyetograph is a graphical representation of the variation of rainfall depth or intensity with time.
		Unit hydrograph techniques, however, can account for variability of the intensity throughout a storm although the overall depth for a storm will be the same for a given duration for each method.
		The following is an example of a rainfall hyetograph for a 25-year, 24-hour storm duration in Harris County using a one-hour time increment for demonstration only.
	manuals.dot.state.tx.us /dynaweb/colbridg/hyd/@Generic__BookTextView/12419;cs=default;ts=default;pt=5362 (1267 words)

	[No title]
		The first ordinate value of the precipitation hyetograph must correspond to time zero (or the beginning) of the simulation period and equal 0.0.
		For subbasins in which rainfall does not begin until after simulation begins, initial components of the rainfall hyetograph are set to zero (up to the time interval during which rainfall begins).
		This procedure creates a hyetograph, depending upon the region of Virginia the basin is in, and knowing the total amount of rainfall and the duration of the rainfall.
	www.people.virginia.edu /~enqstorm/vast/guide (9661 words)

	UCF:CEE:CWR4101(Hydrology)
		What is the volume of runoff produced by the rainfall excess in the previous problem, from an area of 25 acres.
		Develop a hyetograph (six 30-minute periods) for this storm based on the dimensionless diagram developed in the previous problem.
		From a frequency-intensity-duration curve, the intensity is 2 inches per hour for a once in 100 years storm of 4 hours duration.
	www-cee.engr.ucf.edu /classes/cwr4101/exams/exbank1.htm (721 words)

	Rational Hydrograph Method for Small Urban Watersheds (Site not responding. Last check: 2007-10-15)
		In this study, the rational method is expanded into the rational hydrograph method in which the time of concentration is considered as the system memory and the contributing rainfall depth to the present runoff rate is defined as the accumulated precipitation over the past up to the time of concentration.
		In doing so, the complete runoff hydrograph can be generated under a continuous nonuniform hyetograph.
		When the continuous hyetograph is uniform in time, the rational hydrograph method is reduced to the rational method.
	www.pubs.asce.org /WWWdisplay.cgi?0103081 (175 words)

	5.0 Preparation of model inputs for design purposes - uh program (Site not responding. Last check: 2007-10-15)
		To construct hyetographs for any duration, D (h), and storm type, equation (3.7) in Haan et al.
		An example of the hyetographs obtained for the different storm types for the event in the included sample file uh.in (25mm in 6 hours) can be seen in:
		An idealized rainfall hyetograph is generated from the SCS storm type.
	www.icia.rcanaria.es /vfsmod/doc/dochtml/vfsm_doc-6.html (2141 words)

	[No title] (Site not responding. Last check: 2007-10-15)
		The triangular design hyetograph method is developed as a practical method to provide the local storm hyetograph for design of small highway drainage facilities.
		In this Volume, a users guide of the procedure to establish the local design hyetograph is presented.
		In addition, users guides and listings of two computer programs to perform statistical analysis of rainfall moments for triangular hyetographs and for frequency analysis of rainfall depth-duration-return period relation are also presented.
	ma.water.usgs.gov /FHWA/abstracts/fhwa79.htm (233 words)

	On the representation of hyetograph characteristics by stochastic rainfall models
		Koutsoyiannis, D., and N. Mamassis, On the representation of hyetograph characteristics by stochastic rainfall models, Journal of Hydrology, 251, 65-87, 2001.
		The first is the scaling model of storm hyetograph, which belongs to the category of storm-based models.
		However, it is shown that the performance of the Bartlett-Lewis model is significantly improved, and becomes comparable to that of the scaling model, by introducing a power-law dependence of its cell related parameters (duration and rate of arrivals) on the storm duration.
	www.itia.ntua.gr /e/docinfo/423 (357 words)

	Theory - Derivation Of The Chicago Storm
		The synthetic hyetograph computed by the Chicago method is based on the parameters of an assumed Intensity-Duration-Frequency relationship, i.e.
		The asymmetry of the hyetograph is described by a parameter r (where 0 < r < 1) which defines that point within the storm duration td at which the rainfall intensity is a maximum.
		Calculation of the discretized rainfall hyetograph is carried out by integrating these equations to obtain a curve of accumulated volume as illustrated in Figure 7-2 below.
	www.alanasmith.com /theory-Derivation-Chicago-Storm.htm (589 words)

	A Triangular Model of Dimensionless Runoff Producing Rainfall Hyetographs in Texas (Site not responding. Last check: 2007-10-15)
		A synthetic triangular hyetograph for a large data base of Texas rainfall and runoff is needed.
		Synthetic hyetographs are esti- mates of the expected time distribution for a design storm and prin- cipally are used in small watershed hydraulic structure design.
		The analysis also suggests that dimensionless cumulative hyetographs are independent of the frequency level or return period of total storm depth and thus are readily used for many design applications.
	www.awra.org /jawra/papers/J02100.html (264 words)

	w james paper C137
		They are often distinguished by output that includes a single, single-valued (meaning no display of uncertainty) runoff hydrograph computed in response to a single input rainfall hyetograph, usually with a constant timestep.
		Frequencies of the input hyetograph are calculated from a single, simple parameter representing highly variable observed rainfall, and the frequency of the computed hydrograph is assumed to be the same.
		As a result, the artificial input hyetograph is composed of many combinations of rainfall intensities and time intervals (Huber et al., 1986).
	www.eos.uoguelph.ca /webfiles/wjames/homepage/Research/P38a.html (3394 words)

	Section 3
		A precipitation hyetograph is used as the input for all runoff calculations.
		Using any one of the methods, an average precipitation loss is determined for a computation interval and subtracted from the rainfall/snowmelt hyetograph as shown in Figure 3.2.
		The rainfall excess hyetograph is transformed to a subbasin outflow by utilizing the general equation:
	www-cee.engr.ucf.edu /classes/cwr6535/documents/hec-1/manual/section03.htm (10245 words)

	[No title]
		The hyetograph is developed directly from DDF curves rather than from observed storms.
		Construction of the hyetograph In the SCS procedure you are not free to rearrange the increments.
		Graphical Illustration SCS synthetic storm hyetograph for Madison, Wisconsin for a Type II, 50 year 3 hour storm: Rainfall Excess and Abstractions Rainfall Excess Rate EMBED Equation.3 Rainfall Abstraction Rate Rainfall abstractions are defined as those processes that remove rainfall from surface runoff.
	bse.wisc.edu /Students/571thomp/571_Lecture_Notes_2005_Ch2_Handouts.doc (2646 words)

	Problem defining hyetograph in the Runoff Module
		I have a copy of the "Mike SWMM training guide" which we downloaded some time ago rain into a problem early with the "Define Rainfall Control" as described in the first bullet.
		The problem that you have run into is a bug that has recently been corrected and will be in Version 2001 this September.
		The work-around in the mean time is to declare 2 hyetographs in the Run Control dialog, and then switch the number to 1.
	www.bossintl.com /forums/showthread/s/fe6df0f125d015db6954257a97be6ebb/threadid/6137/goto/nextoldest.html (270 words)

	A scaling model of storm hyetograph
		Koutsoyiannis, D., and E. Foufoula-Georgiou, A scaling model of storm hyetograph, Water Resources Research, 29(7), 2345-2361, 1993.
		Empirical evidence suggests that statistical properties of storm rainfall at a location and within a homogeneous season have a well-structured dependence on storm duration.
		Arnaud and J. Lavabre, "Using a stochastic model for generating hourly hyetographs to study extreme rainfalls", Hydrological Sciences Journal, 44(3), 433-446, 1999.
	www.itia.ntua.gr /e/docinfo/46 (644 words)

	User Hyetograph (Site not responding. Last check: 2007-10-15)
		The user hyetograph method can be used if a hyetograph is known for each sub-basin of the watershed you are modeling.
		You can get this hyetograph from recorded data or from any other method.
		You can enter the same or different hyetographs for each basin, but each basin can only have a single hyetograph.
	www.ems-i.com /wmshelp/Hydrologic_Models/Models/HMS/Meteorological_Parameters/User_Hyetograph.htm (81 words)

	New Page 4
		Plot the entire hydrograph and hyetograph on the same plot.
		Speculate how a small watershed with similar topography, but sandy, unfrozen soil might respond to a similar water input event.
		Here is a hyetograph plotted over the resulting hydrograph.
	earth.boisestate.edu /home/jmcnamar/phydro05/homework/hw6.htm (208 words)

	Regional Characteristics of Unit Hydrographs (Site not responding. Last check: 2007-10-15)
		The instantaneous unit hydrograph (IUH) is the direct runoff hydrograph (DRH) resulting from a unit depth of an effective precipitation hyetograph (EPH) applied uniformly over a watershed.
		A major advantage of an IUH over a unit hydrograph (UH) is that the IUH does not require uniform effective precipitation for a specific period of time.
		The direct runoff hydrograph is computed as the convolution of the effective precipitation hyetograph and the IUH kernel function as described by:
	cleveland1.cive.uh.edu /webdocs/Texas_Hydrology/instant_unit_graphs.html (734 words)

	Journal of Environmental Hydrology (Site not responding. Last check: 2007-10-15)
		The temporal rainfall distribution was defined and the effective rainfall (ER) hyetograph using the SCS-CN method was computed.
		By means of convolution of the unit hydrographs with the ER hyetograph, the runoff hydrograph was obtained.
		This hydrograph was routed through a pool-level reservoir to determine water levels.
	www.hydroweb.com /jeh/jeh1996/singhabs.html (170 words)

	Aaron Racicot
		You pass in two CN values to compare and it will plot the Hyetograph and corresponding abstractions and excess rainfall graphs.
		This is the excess hyetograph for the first CN value
		This is the excess hyetograph for the second CN value
	www.ccalmr.ogi.edu /~aaronr/classes/ESE580/HW4/HW_5_5_1.htm (582 words)

	Homework No.1
		The following is the observed effective rainfall hyetograph from a given basin:
		Use the Least-Squares approach to estimate the U.H. corresponding to this situation.
		Compare the hydrographs that would be predicted with b) and c) for the rainfall hyetograph tabulated below.
	www.engr.colostate.edu /~ramirez/ce_old/classes/ce522_ramirez/Homework_1_01.htm (112 words)

	Support Forums - SCS Type II 24-hr Hyetograph
		Does anyone have a good source for the ordinates of the SCS Type II 24-hr hyetograph on 10- or 15-minute intervals?
		I can read them off of several (poorly) enlarged photocopies, but would prefer to have them without the types of errors introduced by graphical interpolation.
		Please note that it does produce some erroneous results for some short timesteps.
	www.bossintl.com /forums/printthread/threadid/12904.html (379 words)

	Theory - Calculating Effective Rainfall - The Green and Ampt Method
		In order to calculate the effective rainfall, this equation must be solved for each time step in the storm hyetograph.
		The application of this algorithm to each time step in the storm hyetograph produces an effective rainfall hyetograph for either the impervious or pervious surface.
		If the surface depression storage is finite this is subtracted from the initial elements of the hyetograph.
	www.alanasmith.com /theory-Calculating-Effective-Rainfall-The-Green-Ampt-Method.htm (790 words)

	[No title] (Site not responding. Last check: 2007-10-15)
		4.3 For the storm hydrograph given in Table 4.3.1 and the rainfall hyetograph given in Table 4.3.2 calculate: A.
		Table 4.4.1 Runoff Times for Subbasins of a Small WatershedTime (hr)Area (ha)124612173531347420725170961813 Table 4.4.2 Storm DataTime (hr)Excess Rainfall (cm hr-1)11.522.332.643.151.861.070.5 4.5 From the hyetograph given in Table 4.5.1 and the corresponding hydrograph in Table 4.5.2, calculate: A.
		The storm hydrograph Table 4.6.1 Hyetograph DataTable 4.6.2 Unit Hydrograph DataTime RainfallTimeOutflow(hr)(cm hr-1)(hr)(m3 s-1)00.000.011.017.121.2214.232.1310.640.847.150.653.6Notes60.0fð index = 0.5 Brock University Laboratory Assignment 4 ERSC 4P61 Surface Hydrology Due Monday, 12 February 2001 Page PAGE 1 ×ØÚÜøú%&ABDHª«çè
	www.brocku.ca /earthsciences/people/scook/4P61-LB-04.doc (315 words)

	miduss_details (Site not responding. Last check: 2007-10-15)
		The Storm command allows you to define a rainfall hyetograph either of the synthetic, design type or a historic storm.
		Storms may also be defined by importing a hyetograph file in simple text format.
		The Catchment command lets you define a single sub-catchment and computes the total overland flow hydrograph for the currently defined storm.
	www.scisoftware.com /products/miduss_details/miduss_details.html (2163 words)

	Defining the Meteorological Model (Site not responding. Last check: 2007-10-15)
		The precipitation method you choose should be based on the type of analysis you want to run.
		If you have rainfall gage data for your watershed, you can use the user hyetograph or the user gage weighting method.
		If you want to create a synthetic storm with a known exceedance probability, select the frequency storm method.
	www.ems-i.com /wmshelp/Hydrologic_Models/Models/HMS/Meteorological_Parameters/Defining_the_Meteorological_Model.htm (168 words)

	AGEN 526 - glossary (Site not responding. Last check: 2007-10-15)
		[areal rainfall] [evaporation] [hyetograph] [interrill erosion] [rainfall intensity]
		Depth of rainfall occurring over an area (must be calculated from point rainfall measurements).
		Instantaneous rate of rainfall occurring at a point.
	pasture.ecn.purdue.edu /~engelb/agen526/glossary.html?rainfall,hyetograph (57 words)

	Objectives 10
		For each storm, make a hyetograph, or bar graph of precipitation depth (in inches) on the vertical axis versus time (in hours) on the horizontal axis.
		Draw a horizontal line across the hyetograph in such a way that the precipitation above the horizontal line equals the depth of excess precipitation.
		From the hyetograph, read off the duration of the storm above the line, in hours.
	www.neiu.edu /~llsander/416/2004/objectives10.html (453 words)

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