Surface spreading‐operations by the basin‐method and tests on underground spreading by means of wells

Abstract

In the densely inhabitated areas surrounding Los Angeles, due to the scarcity of surface storage‐sites, it is essential that all available ground‐water storage‐basins be utilized. In the foothill areas several ideal ground‐water storage‐basins exist, such as the San Gabriel and San Fernando valleys. Each of these basins consists of a coarse granitic material entirely surrounded by mountain ranges with a single confined exit through which all water from the drainage‐area must pass either on the surface or underground. While clay deposits exist in these alluvial fills, they are not continuous and are of small consequence, allowing a direct percolation from the ground‐surface to the water‐table.

Artificial Recharging of Water‐Bearing Formations

“…Mention has also been made of drainage wells, the California diffusion wells, and those of El Paso and Camp Peary. Well recharge with city water was tried at North Hollywood with poor results (19), the formation becoming sealed after a few days of use because of movement of fines in the formation or turbidity in the water.…”