FIGURES (Continued) 



Figure 



Number Page 



3 Total Relief System 1^ 



4 Concrete Pipeline Installation 17 



5 Typical Tile Drainage System - 



West Side of the San Joaquin Valley l8 



6 Concrete Sump l8 



7 Monthly Average Temperature at Los Banos . . 27 



8 "Float Method" Flow Measurement 35 



9 Sampling Methods — Nutrients 36 



10 Variability of Flow, Nutrients, and 

 Total Dissolved Solids from a 



Flooded Tile Drainage System 51 



11 Variability of Flow, Nutrients, and 

 Total Dissolved Solids from a Periodically 

 Irrigated Tile Drainage System 51 



12 Seasonal Variations of Discharge, 

 Nutrient Concentrations, and 



Total Dissolved Solids 52 



13 Seasonal Variation of Nitrogen 

 Concentrations in Different 



Groupings of Soils "5 



14 Seasonal Distribution of Nitrogen Yield 



in Different Groupings of Soils 65 



15 Drainage Site Classes -- Gustine 

 to Mendota Area 



18 Quantities of Nitrate Above the Water 

 Table in Deep Profiles of East 

 and West Side Soils 



66 



16 Nitrate Concentrations within Deep Profiles 



of East and West Side Soils 70 



17 Quantities of Nitrate in Deep Profiles 



of East and West Side Soils 70 



70 



xii 



