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No but possible +
No but possible +
No but possible +
Single Processor +
Creation date"Creation date" is a predefined property that corresponds to the date of the first revision of a subject and is provided by <a target="_blank" rel="nofollow noreferrer noopener" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
22:16:15, 29 March 2010 +
I'm now writing some papers coauthored with James Syvitski, Irina Overeem and Albert Kettner, on historical channel avulsions and source-to-sink sediment budget models of the Yellow River basin. +
https://csdms.colorado.edu/pub/models/doi-source-code/crevasseflow-10.1594.IEDA.100105-0.0.1.tar.gz +
Q(m^3/s): daily water discharge series, 365 by 1 matrix
Qs(kg/s): daily sediment flux series, 365 by 1 matrix
The trigger flood event is set at the 232th day +
As a test, you can use the attached test data Q and Qs, and run
{Qd,Delta_hcs,Bcs,Delta_hcsd,Bcsd,Qout,Qcs,Zcs,Hcs,Vcs}=mainCS(Q,Qs,365,232,1,2,965,2.3,4795,0.009,0.03,1.377e-4,-2,0.0005,0.004,1.5,0.7,1800,2.5e-4,25,4.5e-4) +
daily water discharge series;daily sedimen … daily water discharge series;daily sediment flux series;</br>averaged channel cross-sectional depth, averaged channel cross-sectional width;</br>floodplain width;</br>manning coefficients of the channel and floodplain;</br>longitudinal channel slope;</br>Channel bed's super-elevation above the floodplain where sedimentation rate is close to 0;</br>M-coefficient for erosion rate for the bottom of crevasse splay;</br>M-coefficient for erosion rate for the two side slopes of crevasse splay; </br>critical velocity for erosion; </br>critical velocity for deposition;</br>width of dike at the root; </br>cross valley slope;</br>settling velocity of suspended load in the channel.velocity of suspended load in the channel. +
Key physical parameters:
*Q: water dischar … Key physical parameters:</br>*Q: water discharge upstream crevasse splay;</br>*Qcs: outflow discharge of crevasse splay;</br>*Qabove: the water discharge above the bottom of crevasse splay; </br>*rq: the discharge ratio of Qcs and Qabove;</br>*hs: channel belt's super-elevation (the elevation of lowest point of channel bed);</br>*Zcs: bottom elevation of crevasse splay;</br>*Bcs: width of crevasse splay;</br>*Hcs: flow depth of crevasse splay;</br>*Vcs: flow velocity of crevasse splay;</br>*jcs: slope of the outflow of crevasse splay;</br>*Zcsb: bottom elevation of a crevasse splay whose flow slope is equal to the channel slope j;</br></br>Key physical equations:</br>*Zcs<=max(hs,Zcsb); </br>*rq=(1.55-1.45*Fi)*Bcs/wc+0.16*(1-2*Fi), in which Fi is the Fraud number for flow in the trunk channel, wc is width of the trunk channel;</br>*Hcs=(nc*Qcs/sqrt(jcs)/Bcs)^(3/5);</br>*Vcs=Qcs/Hcs/Bcs;</br>*dE=M*(Vcs^2-ucre^2)/ucre^2*dt, where M is M-coefficient for erosion rate for crevasse slpay, ucre is critical velocity for erosion, dt is time step;</br>*dD=Sv*(1-Vcs^2/ucrd^2)*ws/0.6*dt, where Sv is volume sediment concentration, ucrd is critical velocity for deposition, ws is settling velocity of suspended load, dt is time step. velocity of suspended load, dt is time step. +
length scale: meters
resolution constraint: centimeter +
averaged daily water discharge to lower reach of crevasse splay;
averaged daily crevasse splay depth;
averaged daily crevasse splay width +
As a crevasse splay evolves, the slope of … As a crevasse splay evolves, the slope of its outflow should be no less than the slope of lower channel; and the bottom elevation of a crevasse splay should be no lower than the elevation of lowest point of channel bed, so the bottom elevation of the lowest point that a crevasse splay is able to cut down is max(hs, Zcsb).</br></br>A ratio of Q above the bottom of crevasse splay can be distributed to outflow of crevasse splay. After flow parameters for the outflow of crevasse splay are calculated, the erosion (deposition) rate of crevasse splay can be calculated, thus the morphology of crevasse splay can be updated. </br></br>When the crevasse splay has not yet cut down to the lowest point max(hs,Zcsb), it can be both widened and deepened. When the crevasse splay has cut down to the lowest point max(hs,Zcsb), it can only be widened or silted vertically. can only be widened or silted vertically. +
time scale: decades
resolution constraints: day +
2,011 +
The module is designed to calculate morpho … The module is designed to calculate morphological changes and water discharge outflow of a crevasse splay that is triggered by a preset flood event and evolves afterwards. The inputs for "mainCS.m" should be daily water discharge and sediment flux series of the trunk channel upstream the crevasse splay. The outputs will be daily series for the cross-sectional parameters of the crevasse splay, and daily water discharge series of the trunk channel downstream the crevasse splay. One limitation of the present version is it only calculates the expanding and healing of a crevasse splay, while ignores the possible morphological change (demise or revival) of the trunk channel downstream the crevasse splay. Another limitation is the codes are originally written for the Lower Yellow River(a suspended load dominated river) for the purpose of calculating sediment budget in the Lower Yellow over a long timescale, say as long as hundreds years, so the present module can not be applied to other alluvial rivers without modifying those lines related to channel geometry, bankfull discharge and bank erosion(deposition).ll discharge and bank erosion(deposition). +
Yunzhen +
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ASCII +
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0 +
Terrestrial +
crevasse +, splay +, module +, calculates +, preset flood event +, crevasse splay +, daily water discharge +, water discharge outflow +, water discharge +, trunk channel downstream +, water discharge series +, trunk channel +, preset flood +, flood event +, event and evolves +, daily water +, lower yellow river +, coastal evolution + and crevasseflow +
As code +
coastal evolution +
Media:Testdata.rar +
Tool +
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02:15:28, 17 September 2020 +
2 +
The module calculates crevasse splay morphology and water discharge outflow of a crevasse splay. +
ASCII +
22 Hankou Road +
210093 +
false +
false +
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GPL v2 +
Matlab +
seconds +
Through CSDMS repository +
https://github.com/csdms-contrib/crevasseflow +
Landscape-Scale +
2009 +
Model developer +
