Abstract
This study examines the effects of impervious surfaces within urbanized land on the scaling of river discharge with drainage area. Discharge in a river channel grows as drainage basin area increases following the general equation Q = kAc, where Q is river discharge, k is a measure of river base flow, A is upstream drainage area, and c is the scaling power dependency. Land use is a critical variable in the examination of river discharge; discharge has significant geologic and ecologic influences on fluvial systems. Discharge is assumed to scale linearly or nearly linearly with drainage area (c ∼1), but in spite of its widespread application, the relationship has not been explicitly tested with respect to urbanization. Here we show that in small urban settings the scaling is nonlinear for peak flows. It is proposed that effective water loading occurs through a combination of increased runoff and an increase in the rate of transport to the rivers. These higher discharges in urban rivers have the potential to increase erosion, degrade aquatic habitats, and significantly alter channel forms.
| Original language | English |
|---|---|
| Pages (from-to) | 713-716 |
| Number of pages | 4 |
| Journal | Geology |
| Volume | 34 |
| Issue number | 9 |
| DOIs | |
| State | Published - 1 Sep 2006 |
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Keywords
- Discharge
- Drainage area
- Land use
- Urbanization
- Watershed
Cite this
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Effects of urbanization on watershed hydrology : The scaling of discharge with drainage area. / Galster, Joshua C.; Pazzaglia, Frank J.; Hargreaves, Bruce R.; Morris, Donald P.; Peters, Stephen C.; Weisman, Richard N.
In: Geology, Vol. 34, No. 9, 01.09.2006, p. 713-716.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effects of urbanization on watershed hydrology
T2 - The scaling of discharge with drainage area
AU - Galster, Joshua C.
AU - Pazzaglia, Frank J.
AU - Hargreaves, Bruce R.
AU - Morris, Donald P.
AU - Peters, Stephen C.
AU - Weisman, Richard N.
PY - 2006/9/1
Y1 - 2006/9/1
N2 - This study examines the effects of impervious surfaces within urbanized land on the scaling of river discharge with drainage area. Discharge in a river channel grows as drainage basin area increases following the general equation Q = kAc, where Q is river discharge, k is a measure of river base flow, A is upstream drainage area, and c is the scaling power dependency. Land use is a critical variable in the examination of river discharge; discharge has significant geologic and ecologic influences on fluvial systems. Discharge is assumed to scale linearly or nearly linearly with drainage area (c ∼1), but in spite of its widespread application, the relationship has not been explicitly tested with respect to urbanization. Here we show that in small urban settings the scaling is nonlinear for peak flows. It is proposed that effective water loading occurs through a combination of increased runoff and an increase in the rate of transport to the rivers. These higher discharges in urban rivers have the potential to increase erosion, degrade aquatic habitats, and significantly alter channel forms.
AB - This study examines the effects of impervious surfaces within urbanized land on the scaling of river discharge with drainage area. Discharge in a river channel grows as drainage basin area increases following the general equation Q = kAc, where Q is river discharge, k is a measure of river base flow, A is upstream drainage area, and c is the scaling power dependency. Land use is a critical variable in the examination of river discharge; discharge has significant geologic and ecologic influences on fluvial systems. Discharge is assumed to scale linearly or nearly linearly with drainage area (c ∼1), but in spite of its widespread application, the relationship has not been explicitly tested with respect to urbanization. Here we show that in small urban settings the scaling is nonlinear for peak flows. It is proposed that effective water loading occurs through a combination of increased runoff and an increase in the rate of transport to the rivers. These higher discharges in urban rivers have the potential to increase erosion, degrade aquatic habitats, and significantly alter channel forms.
KW - Discharge
KW - Drainage area
KW - Land use
KW - Urbanization
KW - Watershed
UR - http://www.scopus.com/inward/record.url?scp=33748951578&partnerID=8YFLogxK
U2 - 10.1130/G22633.1
DO - 10.1130/G22633.1
M3 - Article
AN - SCOPUS:33748951578
VL - 34
SP - 713
EP - 716
JO - Geology
JF - Geology
SN - 0091-7613
IS - 9
ER -