Thus, for a given watershed, there can be many unit hydrographs, each one corresponding to a different duration of effective rainfall.
2.
A UH is specific to a particular watershed, and specific to a particular length of time corresponding to the duration of the effective rainfall.
3.
UH theory assumes that a watershed's runoff response is linear and time-invariant, and that the effective rainfall occurs uniformly over the watershed.
4.
In semiarid regions, the lower effective rainfall on steeper slopes also results in less complete vegetative cover, so there is less plant contribution to soil formation.
5.
Isochrone maps can be used to show the time taken for runoff water within a drainage basin to reach a lake, reservoir or outlet, assuming constant and uniform effective rainfall.
6.
Any rain that falls is channeled down the phyllodes and branches to be collected in the soil immediately next to the trunk, providing the tree with a more than threefold increase in effective rainfall.
7.
The municipality of Albuquerque has a poorly developed drainage system, due to presence of permeable limestone, which covers most of municipal area and enables infiltration of large portion of effective rainfall into underground.
8.
The rainfall season occurs from June to December with high rainfall intensity of 285.06mm to 474.22m and less rainfall intensity of 245.30mm to 224.06m from January to the month May which at the same time is the onset of effective rainfall with 75 % probability and it would terminate in February of the following year which consequently during this period the mountainous areas receive higher intensity of rainfall.
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