North Poudre Sediment Study Prog Report

• Project Type: Ag/Muni Grant
• Contract/PO #: C153779
• Applicant: North Poudre Irrigation Company
• Project Name: North Fork Poudre Sedimentation Study
• Title: Progress Report
• Date: 11/1/1997
• County: Larimer
• Water Conservation - Doc Type: Interim Report

-~--

Three pools, marginal sediments, 10/96

100
90
80
" 70
..
=
;;; 80
"
'" so
;:
~ 40
" 30
0.
20
10
0,
12 11 10 9 8 7
fine

100
90
80
fij 70
=
;;; 80
"
'" so
;:
1l 40
;;; 30
0.

O,SkIn

6 5 4 3 2
Phi intelVal

1 0 -1 -2 -3
coarse

Reach I pool, right margin

March 23, 1997

Oct. 13, 1996

20
10

o
12 11 10 9 8 7 6 5 4 3 2 1 0 -1 -2 -3
Phi intelVal

fine

coanle

Reach II upper pool, left margin

100
90
80
" 70
..
=
;;; 80
"
'" so
;:
~ 40
" 30
0.
20
10
0,
12 11 10 9 8 7
fino

6 543 2
Phi interval

1 0 .1 ~2 -3

coarse

Figure 2, (a) Grain size distribution as a percent finer curve for three of the surveyed pools along
the North Fork Poudre, Oct. 1996,
(b) Grain size distribution for the upstream pool (Reach I, 500 m downstream from Halligan
Reservoir Dam), Oct. 1996 and March 1997.
(c) lTTain size rli~trihlltinn fnr;l nnnl? R.1rm t1nurn<:.trp~rn frnm thp rI~rn ()rt 100,c:; o:lIn~ 1\Ao:lIr,..h