FWS!x_ PC?? Verdana 2w  fff(THE THIESSEN METHODXIU R 0@!06'6 |e'efRsfQ0IU R 0@!06'6 |e'efRsfQ0-#U@XP'TZWx 9p){u\|Z)@ *g< X (Land Area >>o &g6 h @(Begin >>@ J o (Determine the area of the drainage basin... @I U R |#JJJTg6e'5 asa'V|PhI U R |#Tg6e'5 asa'V|Ph"      0h@ % g0 h @(Next >> h@@@@ wOG @(First, calculate size of the land area. Let's say that the land area to the left is a total of 250 sq. km.ZX@i@@ i@@ i@@ i@@ @@@@@wlH]'(%οe\5_=q?卂ؚ/EF o)-8{pZBao%rAnAnfp{ ,`@@{ ,`@@{ ,`@@{ ,`@@{ ,`@@{ ,`@@{ ,`@@{ ,`@?-    0h@ ko (Plot the precipitation gages with the amount of ppt recorded at each gage...8 IU R UUU@!056@ |e'@y^NsfU2IU R @!056@ |e'@y^NsfU2IU R @!05'6)霡|e'@y^RsfQ2"8@ wJ (Second, locate the coordinates of each gage in the given area and plot accordingly... note the amount of ppt measured for each gage.BI`i@@ i@@ i@T@ i@@ i@@ i@T@ @@?-(8@'5E b]% :eѠ 1R%.\ FVR5^B>;U?7 w' !_N` (4cmk @ !_N` (5cm#*@ #_m` (3.5cm̀ !_N` (2cmu #_n` (1.5cmh !_N` (3cmi@ 2 oy (Connect the dots... X @I!U R X4@!066 |e'esfRsfU0I"U R X4H%k&g&2@{G))Z'Y͙Y͙DtlI#U R X4@!066 |e'esfRsfU0"$!""#$8@( k%o (Third, draw a dotted line connecting each gage so that triangles are formed.&%&4&Ƞi@(@ i@@ i@@ i@@ 'mb_rh| (%/Y[njPJLio#{b=c؏`X3#?.؏@YgFl<NGlG-m{Ojr-v{жOlG-v{ -@Cjr,:ڜ 6<ʹ=qOo,ݹ# i`Տgk+[o) v ו@\ e$ s-ľ @/jr+p_jr-AWnJ]Rؽi,oGe( QRi 4ڜ <*-m@Cl,@0v oH2m@ l,B:0x $ 6+\ eXh lO gka,6d 'mCl-"6jsl,ie( @] }U Wjp,Jڭ\ ڭ\ 9vWՀ]Q@$@2ݾ@xwo@,  8~vE@n]@GoP-vW N]|'jp,-ڱ\ AvWw]ˆe(V+Z;^oNK/3NZH۵8cl2r3:؏@Zm2'wi@@ i@@ i@@ i@h@ i@4@?-(!""#2(8@1 @ 2)oy (Bisect each line...)X@I*U R #@!16'6 |gesfRs^Q2I+U R #K'V|Phg6e'5 asa",*+++,8H2 -wRK (Now draw lines through the midpoints of each leg of each triangle so that each line meets at a point within each triangle as shown to the left..-|-.i@2@ i@@ i@@ i@@ @M/lE%%O0u5s7WnWWZ`A;r 0/0 @i@7@ i@@ i@@ i@@?-1*+++<18H; @ P2o9+ (Calculate the area for each precipitation gage...2@I3U R @!056@ |e'@y^NsfU2I4U R @!05'6)霡|e'@y^RsfQ2"5344458@< i@4 6o (As you can see, you have just figured out the respective areas represented by each ppt gage!...now determine the size of EACH of these areas (you can use graph paper for this).76"7Hi@<@ i@h i@@ i@ i@@ i@̉ i@@?-83444A88@@ i@ @ >9o} (Create a chart with the data...9I:U R /@!06'5)錩|gesfVs^Q2I;U R /Kʛ'V|Phg6eg5 asYL<U R y (Kʛ'V|Phg6eg5 asY"=:;<;=txA >wP (Record your data as follows: Station Area in Percent Adjusted ppt.. Basin of Total ppt. (cm) (sq. km) Area (col.1 x col.3) ---------------------------------------------------------------- 2cm 15sq km 6% 2 x .06 = 0.12 3.5cm 27sq km 11% 3.5 x .11 = 0.39 5cm 39sq km 16% 5 x .16 = 0.80 1.5cm 43sq km 17% 1.5 x .17 = 0.26 3cm 50sq km 20% 3 x 0.20 = 0.60 4cm 76sq km 30% 4 x 0.30 = 1.20?>*?q܀i@A@ŲU8DRŲU8 |ŦO5o i@@eV8ReV8 & Ō$5}856}8Ej}5B.b}5[}98r1}93M<5﬉ i@@8dR8  D"8@)lQQ<F ܌\> i@@?-@:;<;F@txEUTJUT3T HHɐHG(CKLxQ‌>@44% @IATO8,@>8g8@* y|yc6 >s=@IBTO8,@>8g8@* y|yc6 >s=@"CABBBC =IҀF? DVerdana 4Eo? D( 250sq km 100%FEX FZF $Gg+ h @(3.37cmHGV9"H hF@?-IABBBHI =IҀG@   yJo (The sum of the products of each gage from column 1 and column 3 is the average! That's it!JX"rEFeD@"(J9A^@"=UOUNzUa@"QTqqqG@"f9YNh-@"z^_ @"ɏcV`@?"ɣhM Kw M; h(3.37cm is the average amount of precipitation that fell in this drainage basin during the last storm.$KG +Lo (Close Window%LL@