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<p>The problem may be that you filled sinks in your DEM in a GIS
that used an eight direction (D8) flow direction approach, but
DHSVM uses a four direction (D4) approach as described in the
snippet you included below. <br>
</p>
<p>Did you run the FILL_SINKS_DHSVM.c program to prepare your DEM
prior to running DHSVM? This will fill the sinks in the DEM using
a D4 approach. The source code (if you don't already have it) can
be found here:
<a class="moz-txt-link-freetext" href="https://github.com/pnnl/DHSVM-PNNL/blob/master/DHSVM/program/FILL_SINKS_DHSVM.c">https://github.com/pnnl/DHSVM-PNNL/blob/master/DHSVM/program/FILL_SINKS_DHSVM.c</a></p>
<p>Alternatively there now appears to be a way to configure DHSVM to
use a D8 approach. If you go to this page
(<a class="moz-txt-link-freetext" href="https://github.com/pnnl/DHSVM-PNNL">https://github.com/pnnl/DHSVM-PNNL</a>) and scroll to the bottom
under "Experimental Surface/Subsurface Mode" it describes how you
can enable the D8 approach when building the model with CMake.</p>
<p>I hope that helps.<br>
</p>
<p>E</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 6/7/2023 12:20 AM, 2330152080 wrote:<br>
</div>
<blockquote type="cite"
cite="mid:tencent_33C863A0CDAF0C18E9086CBA7E9BBCAE5705@qq.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<div>Hello:</div>
<div>I find the final surface runoff appears abnormally large in
the final mass balance file. You can see the first figure.</div>
<div>Although I have read the Q&A about this question, but I
really did't know how to resolve it. (fig2)</div>
<div><span style="font-family: "lucida Grande", Verdana,
"Microsoft YaHei";">I hope you can give me some
advice. </span><span style="font-family: "lucida
Grande", Verdana, "Microsoft YaHei";">Thank you
very much for your time.</span></div>
<div><font face="lucida Grande, Verdana, Microsoft YaHei">Shutao
Wang</font></div>
<div><font face="lucida Grande, Verdana, Microsoft YaHei"><br>
</font></div>
<div><img src="cid:part1.AKtXN0VQ.MqZcUset@watershednet.com"
style="" id="img_insert_168612239546507373380510782419"
class=""><br>
<br>
</div>
<div> fig1</div>
<div><br>
</div>
<div><img src="cid:part2.s4ayDDxS.a8KnSlwD@watershednet.com"
alt="" modifysize="51%" diffpixels="8px" style="width: 806px;
height: 295px;" class=""> </div>
<div> fig2</div>
<div><br>
</div>
<div><br>
</div>
<div><font face="lucida Grande, Verdana, Microsoft YaHei"><br>
</font></div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Ed Salminen, Hydrologist
Watershed Professionals Network LLC
PO Box 8 | Mount Hood Parkdale, OR 97041
(541) 490-6644</pre>
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