摘要:

The mechanics of raindrop splash erosion of soil were investigated by using waterdrops impacting at terminal velocity onto various depths of water over smooth glass. Splash weight produced by waterdrop impact varied with waterdrop diameterDand surface water depthd. For a smooth hard surface, predicted splash in terms of waterdrop weight was zero atd/D= 0 and increased to a maximum atd/Dof 0.14 and 0.20 forD= 0.559 cm and 0.296 cm, respectively. The influence of greater depth became relatively insignificant at a depth of about three drop diameters.

ISSN:0043-1397    

DOI:10.1029/WR007i001p00195

年代:1971

数据来源: WILEY

摘要:

Within a river basin, the streams can be classified by the Horton‐Strahler stream order system. In 1945, Horton introduced the law of stream lengths and the law of stream slopes and found the average stream lengths and slopes as semilogarithmic functions of the stream order. In this study, paralleling Horton's development, the law of stream relief is proposed and the average stream relief is found also to be a semilog function of the stream order. Results from numerical analysis indicate that the riverbed profile can be described by a semilog equation expressing stream relief as a function of stream length. The F value in the stream relief equation may be considered as an indicator of the riverbed profile properties; however, more investigations are needed before any conclusive statements can be mad

ISSN:0043-1397    

DOI:10.1029/WR007i001p00201

年代:1971

数据来源: WILEY

摘要:

A test drilling program was conducted at a local dairy in the Spokane Valley, Washington, to determine the effects of feedlot operation on groundwater quality. Coliform bacteria, enterococci, and fecal coliforms were found to die off within a relatively few feet of the ground surface. Chlorides and nitrates, however, proved to be persistent in depth and may actually reach the groundwater body. The low natural moisture content of the soil, coupled with the apparent high moisture tensions, suggests that soil moisture is not presently moving downward in the system. It is concluded that the downward migration of inorganic chemicals from the feedlot environment must represent an early phase of the operation, which is arrested as organic mattes are formed in near‐surface layer

ISSN:0043-1397    

DOI:10.1029/WR007i001p00204

年代:1971

数据来源: WILEY

摘要:

An influence chart is presented that, within its own limitations, makes possible the calculation of the regional effects of pumping without the help of analog or digital models.

ISSN:0043-1397    

DOI:10.1029/WR007i001p00209

年代:1971

数据来源: WILEY

摘要:

The use of a continuous graphic recording system for flow component measurement in miscible displacement experiments is described. This system measures and continuously records radioactive tracer concentrations of effluents of miscible displacement columns. The recordings are needed breakthrough curves. The use of the system obviates fraction collectors.

ISSN:0043-1397    

DOI:10.1029/WR007i001p00211

年代:1971

数据来源: WILEY

ISSN:0043-1397    

DOI:10.1029/WR007i001p00214

年代:1971

数据来源: WILEY

ISSN:0043-1397    

DOI:10.1029/WR007i001p00215

年代:1971

数据来源: WILEY

ISSN:0043-1397    

DOI:10.1029/WR007i001p00221

年代:1971

数据来源: WILEY

ISSN:0043-1397    

DOI:10.1029/WR007i001p00223

年代:1971

数据来源: WILEY