http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Sensitivity of soil loss equations to slope classifications
xii, 79 leaves : illustrations, maps ; 28 cm.
also developed to offer users a complete tool set. A new
analyzed. This analysis indicates that a coaser
and climatic factors have direct effects on soil loss. Slope
based on each HRU. RUSLE and MUSLE models were integrated
classification scheme had higher soil loss prediction.
classified using three different schemes and inputted into
developed in this study. This procedure calculated the slope
Empirical erosion models are often used to estimate the soil
equation (RUSLE) predicts the annual average soil erosion.
erosion and sediment yield. Revised universal soil loss
experiment units in this study. Soil erosions were predicted
features that affect soil loss. Classifying slope gradient
GIS to decompose watershed into hydrologic response units.
gradient and slope length are two most important topographic
length of each HRU and could compensate the deficiencies of
Model predictions were made for each classification scheme.
models (RUSLE and MUSLE) vary when different criteria are
Modified universal soil loss equation (MUSLE) predicts
parameters and integrate soil loss equations with GIS are
predictions. This thesis studied how the predictions of
previous watershed erosion studies. HRU were used as the
procedure using the flowlength function of GIS was also
Procedures to develop hydrologic response units, model input
provide a better consideration of spatial variability of the
sediment yield on a storm event base. The land attributes
soil erosion processes. HRU were used as analysis windows in
such as topographic features, soil types, vegetation covers
The resulting three different sets of predictions were
used to classified the slope gradients. Decomposing a
Water erosion is a major cause of watershed degradation.
watershed into a set of hydrological response units (HRU) can
with a geographic information system (GIS). Slope was
with different criteria may lead to different model
"Major subject: Rangeland Ecology and Management".
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