Chapter I

PHYSICAL CHARACTERISTICS OF THE ARID REGION: Page.

The Arid Region 5

Irrigable lands 6

Advantages of irrigation 10

Coöperative labor or capital necessary for the development of
irrigation 11

The use of smaller streams sometimes interferes with the use of the
larger 12

Increase of irrigable area by the storage of water 12

Timber lands 14

Agricultural and timber industries differentiated 18

Cultivation of timber 19

Pasturage lands 19

Pasturage farms need small tracts of irrigable land 21

The farm unit for pasturage lands 21

Regular division lines for pasturage farms not practicable 22

Farm residences should be grouped 22

Pasturage lands cannot be fenced 23

Recapitulation 23

Irrigable lands 23

Timber lands 23

Pasturage lands 24

CHAPTER II.

THE LAND-SYSTEM NEEDED FOR THE ARID REGION:

Irrigable lands 27

Timber lands 27

Pasturage lands 28

A bill to authorize the organization of irrigation districts 30

A bill to authorize the organization of pasturage districts 33

Water rights 40

The lands should be classified 43

CHAPTER III.

THE RAINFALL OF THE WESTERN PORTION OF THE UNITED STATES:

Precipitation of the Sub-humid Region 47

Precipitation of the Arid Region 48

Precipitation of the San Francisco Region 49

Precipitation of the Region of the Lower Columbia 49

Distribution of rain through the year 50

Precipitation of Texas 50

Precipitation of Dakota 51

Seasonal precipitation in the Region of the Plains 52

Seasonal precipitation in the San Francisco Region 53

Mean temperature, by seasons, for the San Francisco Region 54

Seasonal precipitation and temperature on the Pacific Coast, etc. 55

Seasonal precipitation in Arizona and New Mexico 56

CHAPTER IV.

WATER SUPPLY.--BY G. K. GILBERT:

Increase of streams 57

Rise of Great Salt Lake 58

Volcanic theory 67

Climatic theory 68

Theory of human agencies 71

Farming without irrigation 77

CHAPTER V.

CERTAIN IMPORTANT QUESTIONS RELATING TO IRRIGABLE LANDS:

The unit of water used in irrigation 81

The quantitative value of water in irrigation 81

Area of irrigable land sometimes not limited by water supply 85

Method of determining the supply of water 85

Methods of determining the extent of irrigable land unlimited by
water supply 86

The selection of irrigable lands 87

Increase in the water supply 89

CHAPTER VI.

THE LANDS OF UTAH:

Physical features 93

Timber 98

Irrigable and pasturage lands 103

Uinta-White Basin 103

The Cañon Lands 105

The Sevier Lake District 106

The Great Salt Lake District 106

Grasses 107

Table of Irrigable lands in Utah Territory 111

CHAPTER VII.

IRRIGABLE LANDS OF THE SALT LAKE DRAINAGE SYSTEM.--BY G. K. GILBERT:

Irrigation by the larger streams 117

Bear River drainage basin 119

Weber River drainage basin 121

Jordan River drainage basin 124

Irrigation by smaller streams 126

CHAPTER VIII.

IRRIGABLE LANDS OF THE VALLEY OF THE SEVIER RIVER.--BY CAPT. C. E.
DUTTON:

Altitudes of the San Pete Valley 133

Volume of flowing water in San Pete Valley 140

Irrigable lands of the Sevier Lake District 144