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<br />10. Conoapt~ of the two analyses, regarding the nature and
<br />treatment of oaloulated aooretion values, are not the sarns. So-
<br />oalled net"aooretion effeDta CeddOil. to State line were oaloulated in
<br />first analyses (Table 24) at 120,300 AF annually during 1908-1942. ..
<br />that being the average for the 35-year period derived from a total
<br />that inoluded all plus and all minus values. Seoond analyses assume
<br />that PIUSJ values, termed positi.,.e aoorllt1ons, represent aotuali water
<br />suppl18S'. and, minUSJ Ya:lues:;,orneg",t,iie'faooretions, (termed! deoretions)
<br />represemr. IIIOtualwaterloBfl~s.te!'ll1eauses).n.oonveyan,oe.and that the
<br />two are unrelated to eaoh pth'er. ' and must be sePar~tlllyass~bled!and
<br />averae;ed ~for'eaoh' subseo1;iono:f';~e;rlverindependently.;ior'fegardless;
<br />of aooretionshowings in adjoin1ng.eotions,atthe samet:l.me and frOl1r
<br />the same :reoords. ,Second analyses report. for the river seotion
<br />Caddo& to State line, from sub-seotion oaloulations above andbelo~
<br />Lamar. that aooretions averaged 138.100 AF. - whioh is the average of
<br />all plus values: derived from a total that disregards all minus values
<br />in bothsub-seotions.... and that dJloJ:"etions averaged .17.00q AF. ..
<br />'Wh1'oh;,ii1'"the "'average of all '1Diiius,'valuelJ;derivedifrom a: total thai:
<br />exoludes allplusvaluesi in both; sub-se.otions. 'The oonoept of first
<br />analyses is that oaloulated plus and minus: accretion values are
<br />inherently related. both being merely the oalculated differenoes
<br />between measured inflows, and outflews. First analyses; recognize that
<br />both plus and minus accretion values. are in part actual and in part
<br />fiotitious. in the sense that they are created by or result from. errors.
<br />in the recorcl;s. or departure.s :from perfect aoouraoy that are recognized
<br />as unavoidable in the reoords. First analyses; tend to minimize the
<br />effeottll of errors in the reoords . whereas the conoeptsdlf.seParate .sub-,."
<br />seotionlll' ~dunre:iated acoretions"and 'decretionsof seoontli ane.1yse.r, tend .,'; .(l.
<br />'to illagnH'y,the 'effect.. of"errors in'tlle reoords. andthe'reby to oreate
<br />by oaloulation supplies of water which aotually were non-existent.
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<br />11. Seoond analyees made no attempt to olassify streamfloW'
<br />volumes: into usable and unusable oategories. Instead a theory of
<br />proportionate use was adopted. under whiohall uses of water. both by
<br />diversion and in oonveyanoe. were assumed to have been made from total
<br />streamflow volumes inoludingfloods' contributed to eaoh sub-seotion by
<br />river flows frClll Caddo8J and by inflows below Caddoa. This adopted
<br />theory of proportionate. use appears to have little if any value in
<br />reservoir operations studies, or in providing information needed for
<br />questions. sought to be answered by such studies. in as much as the
<br />relations that historioally prevailed, between Caddoa flows and inflows
<br />below Caddoa. will necessarily change with the storage and release ot
<br />Caddoa flows; by John Martin Reservoir. ~ inflows below being not subject
<br />to oontrol or conservation at Caddoa. Instead of assuming, as in seoond
<br />analyses. 'that historio diversions were lll!I.de in part from undivert1ble
<br />strelUllfhws.would it not be more logical to assume they were made
<br />whol11 from, usable water supplies1Similarly. with respect to oaloulated
<br />aocretions. why pot assume that minus values are to be Ihet or offset. )'
<br />first. from plus values: so far as possiblo, and thereby avoid burdening
<br />the prinoipal and oontrollable water supply with tiotitioua;depletions
<br />oalculated from erroneous records'"
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