WSP03457

• File Number: 8276.100
• Description: Grand Valley Unit - Colorado River Basin Salinity Project
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 4/1/1992
• Title: Grand Valley Salinity Project Monitoring and Evaluation Program -- 1990 Annual Report
• Water Supply Pro - Doc Type: Annual Report

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TABLE OF CONTENTS

Summary .....................................................
Introduct i on ................................................
Project Locat ion ............................................
Prob I ems in the Grand Va II ey ................................
Objecti ves of the M&E Program...............................

PaQe
1
2
2
2
4

Part 1. Irrigation Monitoring and Evaluation
Findings and Recommendations ........................ 5

Scope ............................................... 7
Methodo logy ......................................... 9
Site Se I e c t ion ...................................... 10
Equ i pment Set-Up .................................... 10
Measurements and Calculations .................. ..... 11
Resu I ts and Discuss i on .............................. 12

Water Budget................................. 14
Appl ication Efficiency.............. ......... 16
Deep Percolation ............................. 17

A I fa I fa ...................................... 20
Corn ......................................... 22
Sma II Gra in. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Orchard ...................................... 26
Grapes ....................................... 27
Beans ........................................ 27
On ions ....................................... 28
Surge and Conventional Irrigation Comparison. 28
Infi I trati on Estimates....................... 32

Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Tab I e 6.
Table 7.
Table 8.
Table 9.
Table 10.

TABLES

Irrigation Monitoring Sites, 1985-1990 ............ 8
1990 Annual Summary............................... 13
Comparison of Site Data, 1985-1990 ....... ......... 15
Six-Year Summary of Irrigation Monitoring Data .... 15
Summary of Deep Percolation Losses and Salt Load
Reduction for Monitored Sites, 1990 ............ 19
Acceptable and Actual Deep Percolation for
Different Crops................................ 21
1990 Deep Percolation for Surface Systems ......... 23
Six-Year Summary of Irrigation Monitoring Data
by Crops, 1985-1990 ............................ 24
Comparison of Conventional and Surge Irrigation, 1990 30
Actual Deep Percolation and Salt Load Reduction
from Surge Sites ............................... 31