Applicability of the Climate Hazards Group Infrared Precipitation with Stations as Rainfall Input for SWAT Watershed Modeling

2021 ◽  
Vol 48 (6) ◽  
pp. 925-935
Author(s):  
Lanie A. Alejo ◽  
Victor B. Ella ◽  
Ronaldo B. Saludes
Keyword(s):  
Watershed Modeling ◽  
Climate Hazards

Watershed modeling applications in south Texas

Fact Sheet ◽  
2012 ◽  
Author(s):  
Diana E. Pedraza ◽  
Darwin J. Ockerman
Keyword(s):  
Watershed Modeling ◽  
South Texas

DETERMINISTIC APPROACH TO WATERSHED MODELING

1971 ◽  
Vol 2 (3) ◽  
pp. 146-166 ◽  
Author(s):  
DAVID A. WOOLHISER
Keyword(s):  
Boundary Conditions ◽  
Watershed Modeling ◽  
Deterministic Approach ◽  
Mass Energy ◽  
Deterministic Models ◽  
Conservation Of Mass ◽  
Hydrologic Process ◽  
Theoretical Structure ◽  
Physically Based ◽  
Initial And Boundary Conditions

Physically-based, deterministic models, are considered in this paper. Physically-based, in that the models have a theoretical structure based primarily on the laws of conservation of mass, energy, or momentum; deterministic in the sense that when initial and boundary conditions and inputs are specified, the output is known with certainty. This type of model attempts to describe the structure of a particular hydrologic process and is therefore helpful in predicting what will happen when some change occurs in the system.

Impacts of climate hazards on coastal livelihoods in Ghana: the case of Ningo-Prampram in the Greater Accra region

2021 ◽  
Author(s):  
George Darko ◽  
Shuoben Bi ◽  
Isaac Sarfo ◽  
Solomon Obiri Yeboah Amankwah ◽  
Folorunso Ewumi Azeez ◽  
...  
Keyword(s):  
Climate Hazards ◽  
Greater Accra Region ◽  
Coastal Livelihoods

Watershed modeling in the Tyrrhena Terra region of Mars

2010 ◽  
Vol 115 (E9) ◽  
Author(s):  
Scott C. Mest ◽  
David A. Crown ◽  
William Harbert
Keyword(s):  
Watershed Modeling

scholarly journals Multi-gauge Calibration for Modeling the Semi-Arid Santa Cruz Watershed in Arizona-Mexico Border Area Using SWAT

2012 ◽  
Vol 5 ◽  
pp. ASWR.S9410 ◽  
Author(s):  
Rewati Niraula ◽  
Laura M. Norman ◽  
Thomas Meixner ◽  
James B. Callegary
Keyword(s):  
Assessment Tool ◽  
Soil Layer ◽  
Watershed Modeling ◽  
Base Flow ◽  
Shallow Aquifer ◽  
Return Flow ◽  
Monitoring Site ◽  
Santa Cruz ◽  
Mexico Border ◽  
Semi Arid

In most watershed-modeling studies, flow is calibrated at one monitoring site, usually at the watershed outlet. Like many arid and semi-arid watersheds, the main reach of the Santa Cruz watershed, located on the Arizona-Mexico border, is discontinuous for most of the year except during large flood events, and therefore the flow characteristics at the outlet do not represent the entire watershed. Calibration is required at multiple locations along the Santa Cruz River to improve model reliability. The objective of this study was to best portray surface water flow in this semi-arid watershed and evaluate the effect of multi-gauge calibration on flow predictions. In this study, the Soil and Water Assessment Tool (SWAT) was calibrated at seven monitoring stations, which improved model performance and increased the reliability of flow predictions, in the Santa Cruz watershed. The most sensitive parameters to affect flow were found to be curve number (CN2), soil evaporation and compensation coefficient (ESCO), threshold water depth in shallow aquifer for return flow to occur (GWQMN), base flow alpha factor (ALPHA_BF), and effective hydraulic conductivity of the soil layer (CH_K2). In comparison, when the model was established with a single calibration at the watershed outlet, flow predictions at other monitoring gauges were inaccurate. This study emphasizes the importance of multi-gauge calibration to develop a reliable watershed model in arid and semi-arid environments. The developed model, with further calibration of water quality parameters will be an integral part of the Santa Cruz Watershed Ecosystem portfolio Model (SCWEPM), an online decision support tool, to assess the impacts of climate change and urban growth in the Santa Cruz watershed.

scholarly journals A framework for evaluating regional hydrologic sensitivity to climate change using archetypal watershed modeling

2013 ◽  
Vol 17 (8) ◽  
pp. 3077-3094 ◽  
Author(s):  
S. R. Lopez ◽  
T. S. Hogue ◽  
E. D. Stein
Keyword(s):  
Climate Change ◽  
Watershed Modeling ◽  
Suspended Sediments ◽  
Precipitation Variability ◽  
Sediment Flux ◽  
Urban Systems ◽  
Climate Scenarios ◽  
Hydrologic Simulation ◽  
Change Temperature ◽  
Land Covers

Abstract. The current study focuses on the development of a regional framework to evaluate hydrologic and sediment sensitivity, at various stages of urban development, due to predicted future climate variability. We develop archetypal watersheds, which are regional representations of observed physiographic features (i.e., geomorphology, land cover patterns, etc.) with a synthetic basin size and reach network. Each of the three regional archetypes (urban, vegetated and mixed urban/vegetated land covers) simulates satisfactory regional hydrologic and sediment behavior compared to historical observations prior to a climate sensitivity analysis. Climate scenarios considered a range of increasing temperatures, as estimated by the IPCC, and precipitation variability based on historical observations and expectations. Archetypal watersheds are modeled using the Environmental Protection Agency's Hydrologic Simulation Program–Fortran model (EPA HSPF) and relative changes to streamflow and sediment flux are evaluated. Results indicate that the variability and extent of vegetation play a key role in watershed sensitivity to predicted climate change. Temperature increase alone causes a decrease in annual flow and an increase in sediment flux within the vegetated archetypal watershed only, and these effects are partially mitigated by the presence of impervious surfaces within the urban and mixed archetypal watersheds. Depending on the extent of precipitation variability, urban and moderately urban systems can expect the largest alteration in flow regimes where high-flow events increase in frequency and magnitude. As a result, enhanced wash-off of suspended sediments from available pervious surfaces is expected.

scholarly journals Long-term nutrient reductions lead to the unprecedented recovery of a temperate coastal region

2018 ◽  
Vol 115 (14) ◽  
pp. 3658-3662 ◽  
Author(s):  
Jonathan S. Lefcheck ◽  
Robert J. Orth ◽  
William C. Dennison ◽  
David J. Wilcox ◽  
Rebecca R. Murphy ◽  
...  
Keyword(s):  
Chesapeake Bay ◽  
Structural Equation ◽  
Aquatic Vegetation ◽  
Structural Equation Models ◽  
Anthropogenic Impacts ◽  
Watershed Modeling ◽  
Unexpected Finding ◽  
Nutrient Loads ◽  
Management Actions ◽  
Successful Recovery

Humans strongly impact the dynamics of coastal systems, yet surprisingly few studies mechanistically link management of anthropogenic stressors and successful restoration of nearshore habitats over large spatial and temporal scales. Such examples are sorely needed to ensure the success of ecosystem restoration efforts worldwide. Here, we unite 30 consecutive years of watershed modeling, biogeochemical data, and comprehensive aerial surveys of Chesapeake Bay, United States to quantify the cascading effects of anthropogenic impacts on submersed aquatic vegetation (SAV), an ecologically and economically valuable habitat. We employ structural equation models to link land use change to higher nutrient loads, which in turn reduce SAV cover through multiple, independent pathways. We also show through our models that high biodiversity of SAV consistently promotes cover, an unexpected finding that corroborates emerging evidence from other terrestrial and marine systems. Due to sustained management actions that have reduced nitrogen concentrations in Chesapeake Bay by 23% since 1984, SAV has regained 17,000 ha to achieve its highest cover in almost half a century. Our study empirically demonstrates that nutrient reductions and biodiversity conservation are effective strategies to aid the successful recovery of degraded systems at regional scales, a finding which is highly relevant to the utility of environmental management programs worldwide.

Sign in / Sign up

Export Citation Format

Share Document