Interpretation of Hydrologic Effects of Climate Change in the Sacramento-San Joaquin River Basin, California PDF Download
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Author: Dennis P. Lettenmaier
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 111
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Author: Dennis P. Lettenmaier
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 111
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Book Description
Author: Darren L. Ficklin
Publisher:
ISBN: 9781124508566
Category : Agricultural pollution
Languages : en
Pages :
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Book Description
The Soil and Water Assessment Tool (SWAT) and HYDRUS were used to assess the impact of climate change on the hydrologic cycle (streamflow, surface runoff, groundwater recharge, evapotranspiration, and irrigation water use) and agricultural pollutant runoff (sediment, nitrate, phosphorus, chlorpyrifos, and diazinon) in the Sacramento and San Joaquin River watersheds in California's Central Valley. Five separate studies were constructed. For the first three studies, hydrological responses were modeled in the San Joaquin River watershed using variations of atmospheric CO2 (550 and 970 ppm), temperature (+1.1 and +6.4°C), and precipitation (0%, ±10%, and ±20%) based on Intergovernmental Panel on Climate Change projections. The fourth study used a calibration and an uncertainty analysis technique for the calibration of the Sacramento River watershed. This study confirmed that SWAT was able to capture the large amount of uncertainty within the Sacramento River watershed and successfully simulate streamflow, sediment, nitrate, chlorpyrifos and diazinon loads. The final study used a novel stochastic climate change analysis technique to bracket the 95% confidence interval of potential climate changes. For all studies, increases in precipitation generally changed the hydrological cycle and agricultural runoff proportionally, where increases in precipitation resulted in increases in surface runoff and thus agricultural runoff and vice-versa. Also, for all studies, increasing temperature caused a temporal shift in plant growth patterns and redistributed evapotranspiration and irrigation water demand earlier in the year. Increasing atmospheric CO2 resulted in watershed-wide decreases in evapotranspiration, therefore increasing water yield and streamflow while concurrently decreasing irrigation water use. This research improves the understanding between climate change and hydrology and agricultural pollutant runoff within the Central Valley of California. Theses climate change analyses may be used by water resource managers to evaluate the potential effects of climate change.
Author:
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 380
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Author: United States. Environmental Protection Agency
Publisher:
ISBN:
Category : Atmospheric carbon dioxide
Languages : en
Pages : 480
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Author:
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 76
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Book Description
Global climate change has the potential to dramatically alter hydrologic conditions in California by changing the spatial and temporal patterns of snow accumulation and snow melt. The water management infrastructure in California has been designed and is operated in accordance with historic hydrologic patterns. Understanding if and how this infrastructure can be managed in the face of global climate change in order to meet the array of vital water management objectives for the system is a critical research question addressed in part by this study. Here an application of the Water Evaluation and Planning (WEAP) system, developed by the Stockholm Environment Institute, is presented for California's Sacramento River Basin. WEAP is an integrated hydrology and water resources systems model that allows for assessment of climate change impact and adaptation in the water sector based solely on future climate time series. The model is used to evaluate the impact of four future climate scenarios on agricultural water management in the region, and to investigate whether water management adaptation could reduce potential impacts.
Author:
Publisher:
ISBN:
Category : California
Languages : en
Pages : 68
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 574
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Author: Michael C. MacCracken
Publisher:
ISBN:
Category : Central Valley (Calif. : Valley)
Languages : en
Pages : 20
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Author:
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 444
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Author:
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 962
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