DOI: 10.5194/hess-21-3483-2017
Scopus记录号: 2-s2.0-85023770540
论文题名: Simulating cold-region hydrology in an intensively drained agricultural watershed in Manitoba, Canada, using the Cold Regions Hydrological Model
作者: Cordeiro M ; R ; C ; , Wilson H ; F ; , Vanrobaeys J ; , Pomeroy J ; W ; , Fang X
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 7 起始页码: 3483
结束页码: 3506
语种: 英语
Scopus关键词: Agriculture
; Clay
; Floods
; Frozen soils
; Groundwater flow
; Hydrology
; Ice
; Rivers
; Sensitivity analysis
; Snow
; Soil moisture
; Soils
; Stream flow
; Water
; Water levels
; Watersheds
; Agricultural watersheds
; Cold region hydrologies
; Cold regions hydrological model
; Hydrological modelling
; Hydrological response
; Infiltration to frozen soil
; Northern great plains
; Watershed scale hydrological process
; Infiltration
; discharge
; flooding
; flow measurement
; hydrological modeling
; hydrological response
; ice cover
; infiltration
; peak flow
; simulation
; snowmelt
; streamflow
; travel time
; water budget
; watershed
; Canada
; Great Plains
; Red River [Canada-United States]
英文摘要: Etrophication and flooding are perennial problems in agricultural watersheds of the northern Great Plains. A high proportion of annual runoff and nutrient transport occurs with snowmelt in this region. Extensive surface drainage modification, frozen soils, and frequent backwater or ice-damming impacts on flow measurement represent unique challenges to accurately modelling watershed-scale hydrological processes. A physically based, non-calibrated model created using the Cold Regions Hydrological Modelling platform (CRHM) was parameterized to simulate hydrological processes within a low slope, clay soil, and intensively surface drained agricultural watershed. These characteristics are common to most tributaries of the Red River of the north. Analysis of the observed water level records for the study watershed (La Salle River) indicates that ice cover and backwater issues at time of peak flow may impact the accuracy of both modelled and measured streamflows, highlighting the value of evaluating a non-calibrated model in this environment. Simulations best matched the streamflow record in years when peak and annual discharges were equal to or above the medians of 6.7gm3gsg'1 and 1.25g × 107gm3, respectively, with an average Nash-Sutcliffe efficiency (NSE) of 0.76. Simulation of low-flow years (below the medians) was more challenging (average NSEg < g0), with simulated discharge overestimated by 90g% on average. This result indicates the need for improved understanding of hydrological response in the watershed under drier conditions. Simulation during dry years was improved when infiltration was allowed prior to soil thaw, indicating the potential importance of preferential flow. Representation of in-channel dynamics and travel time under the flooded or ice-jam conditions should also receive attention in further model development efforts. Despite the complexities of the study watershed, simulations of flow for average to high-flow years and other components of the water balance were robust (snow water equivalency (SWE) and soil moisture). A sensitivity analysis of the flow routing model suggests a need for improved understanding of watershed functions under both dry and flooded conditions due to dynamic routing conditions, but overall CRHM is appropriate for simulation of hydrological processes in agricultural watersheds of the Red River. Falsifications of snow sublimation, snow transport, and infiltration to frozen soil processes in the validated base model indicate that these processes were very influential in stream discharge generation. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79118
Appears in Collections: 气候变化事实与影响
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作者单位: Science and Technology Branch, Agriculture and Agri-Food Canada, Winnipeg, Canada; Science and Technology Branch, Agriculture and Agri-Food Canada, Brandon, Canada; Science and Technology Branch, Agriculture and Agri-Food Canada, Morden, Canada; Centre for Hydrology, University of Saskatchewan, Saskatoon, Canada
Recommended Citation:
Cordeiro M,R,C,et al. Simulating cold-region hydrology in an intensively drained agricultural watershed in Manitoba, Canada, using the Cold Regions Hydrological Model[J]. Hydrology and Earth System Sciences,2017-01-01,21(7)