manual for estimation of probable maximum precipitation - WMO
manual for estimation of probable maximum precipitation - WMO
manual for estimation of probable maximum precipitation - WMO
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Figure<br />
5.4<br />
5.5<br />
CONTENTS XI<br />
Examples <strong>of</strong> temporal sequences <strong>of</strong> 6-h precipiration in<br />
major storms in eastern and central United States 122<br />
Page<br />
Standard isohyetal pattern recommended <strong>for</strong> spatial<br />
distribution <strong>of</strong> PMP <strong>for</strong> the United States east <strong>of</strong> the<br />
lOSth meridian " u.......... 124<br />
5.6 Analysis <strong>of</strong> isohyetal orientations <strong>for</strong> selected major<br />
storms in United States east <strong>of</strong> the 105th meridian adopted<br />
as recommended orientation <strong>for</strong> .PMP within ± 40°........... 126<br />
5.7 Model <strong>for</strong> determining the adjustment factor to apply to<br />
isohyet values as a result <strong>of</strong> placing the pattern in<br />
Figure 5.5 at an orientation differing from that given in<br />
Figure 5.6 by more than ±400, <strong>for</strong> a specific location••••• 127<br />
5.8 Schematic diagram showing the relation between depth-area<br />
curve <strong>for</strong> PMP a¥d the within/without-storm relations <strong>for</strong><br />
fliP at 2 590 km II D D .. .. .. .. .. 129<br />
5.9<br />
5.10<br />
5.11<br />
5.12<br />
5.13<br />
5.14<br />
5.15<br />
5.16<br />
5.17<br />
5.18<br />
5.19<br />
Six-h within/without-storm average curves <strong>for</strong> standard<br />
Within/without storm curves <strong>for</strong> PMP at 37°N, 89°W <strong>for</strong><br />
standard area sizes 131<br />
Isohyetal pr<strong>of</strong>iles <strong>for</strong> standard area sizes at 37°N, 89°W.. 133<br />
Nomogram <strong>for</strong> the 1st 6-h PMP increment and <strong>for</strong> standard<br />
isohyet area sizes be tween 25.9 and 103 600 km 2 ........... 13 4<br />
Example <strong>of</strong> computation sheet showing typical <strong>for</strong>mat••••••• 137<br />
Topography classified on basis <strong>of</strong> effect on rainfall,<br />
Tennessee River basin above Chatanooga, Tennessee 142<br />
Adopted 2.6-km 2 PMP with supporting data, Tennessee River<br />
basin 143<br />
PMP depth-duration curves <strong>for</strong> basins up to 259 km 2 in<br />
Tennessee River basin " · 144<br />
Moisture index chart <strong>for</strong> north-west portion <strong>of</strong> Tennessee<br />
River basin above Chattanooga, Tennessee••••.••••••.•••••• 145<br />
Latitudinal rainfall gradient (in per cent) in southeastern<br />
portion <strong>of</strong> Tennessee River basin above<br />
Chattanooga, Tennessee••••••.•••••.••••••••••••••••••••••• 146<br />
Six-h 2.6-km 2 PMP (in.) Tennessee River basin above<br />
Chattanooga, Tennessee••••.•••••.•••••.••••••••••••••••••• 147
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