CONTROL OF FLOOD WATER IN SOUTH KRN CALIFORXLX 429 



up to the period of the chart is relatively constant. This flow likewise 

 held up all during the past summer season, while the other stream 

 dropped considerably when the hot weather commenced in earnest, 

 though data is unavailable at this time. 



There is one other point which deserves much consideration and 

 which was not considered when the work was first begun. It has been 

 mentioned that the settling basins held more or less of the transported 

 soil, which acted as storage reservoirs. Much of this water that is so 

 held back does not get into the stream again, but sinks into the gravels 

 and supplies the underground water basin. How much this amounts 

 to probably can never be determined, for practically all of the valley 

 floor is underlaid by a big artesian belt. At the lower end of the 

 debris cone on which Littlelands is built and which is the debris cone 

 of Haines Canyon are a number of wells, and since these dams have 

 been installed the water-level in these has raised around 50 feet, in 

 spite of a deficiency in the precipitation and the increased amount of 

 pumping due to the lessened flow from the various canyons nearby, 

 and to an increase in the acreage of improved lands irrigated by water 

 from the pumping plants. 



From the work done it is easy to see the efficiency of these dams in 

 reducing flood peaks, preventing soil transportation, and increasing 

 the water supply. Such work is only the forerunner of much that is 

 to be done and may be of as much value where rains are abundant, 

 as in the Southwest, with its freakish and abnormal annual precipita- 

 tions. 



