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首页> 外文会议>Managing Climate Change Impacts on Water Resources: Adaptation Issues, Options, and Strategies >Predicting Water Quality in Lake Mead: Climate Change and Drought
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Predicting Water Quality in Lake Mead: Climate Change and Drought

机译：预测米德湖的水质：气候变化和干旱

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The onset of the drought in the Colorado River has heighted the attention of the Southern Nevada Water Authorityrn(SNWA) to the broader issue of climate change. Climate change impacts on the Colorado River may be significant. Thernmajority of regional climate models project a more arid climate and reductions in Colorado River runoff. These reductionsrnare expected to be in addition to natural-flow variability and temporary drought conditions. Changes in timing and frequencyrnof rainfall may impact the River’s water quality and its treatability for drinking water supplies.rnThe drought on the Colorado River has reshaped Lake Mead dramatically in the past 11 years. Water levels have droppedrnover 130 feet (40 m) and SNWA’s drinking water intakes have moved from an approximate depth of 210 ft (64m) when thernlake is full, to an 80 ft (24 m) depth at current conditions.rnSNWA has an extensive water quality monitoring program in Lake Mead that was developed to track changes inrnwater quality over time and provide an early warning system for water quality changes at the drinking water intakes.rnSamples are collected in Lake Mead and at all of the inflows, which include the Las Vegas Wash, the Muddy River, thernVirgin River, and the Colorado River.rnSNWA has also become involved in a three dimensional modeling effort with another agency in the Las Vegasrnvalley, the Clean Water Coalition. Flow Science Incorporated was tasked with developing a three dimensional model ofrnLake Mead for use as a predictive tool. The probabilities and consequences of adverse events (severe droughts, floods,rnchanges in water quality) are often highly uncertain and potentially severe. The modeling tool helps SNWA in identifyingrnand prioritizing key water quality threats and developing response and adaptation options that target the most significant risksrnto the drinking water supply. Modeling was used to select a new intake location and for evaluating the impact of wastewaterrneffluent.
机译：科罗拉多河干旱的爆发已经引起内华达州南部水务局（SNWA）对更广泛的气候变化问题的关注。气候变化对科罗拉多河的影响可能很大。多数地区气候模型预测气候将更加干旱，科罗拉多河径流将减少。这些减少预计是自然流量变化和临时干旱条件的补充。降雨时间和频率的变化可能会影响河流的水质及其饮用水的可处理性。过去11年中，科罗拉多河的干旱​​严重改变了米德湖。水位下降了130英尺（40 m），SNWA的饮水量已从湖水充满时的大约210英尺（64m）的深度移至当前条件下的80英尺（24 m）的深度。米德湖水质监测计划旨在追踪随时间推移的地下水水质变化，并为饮用水取水口的水质变化提供预警系统。rn米德湖和所有流入水（包括拉斯维加斯）均采集样品Wash，Muddy River，thernVirgin River和Colorado River.rnSNWA还与拉斯维加斯维尔瓦利的另一个机构Clean Water Coalition一起参与了三维建模工作。 Flow Science Incorporated的任务是开发rnLake Mead的三维模型以用作预测工具。不良事件（严重干旱，洪水，水质变化）的可能性和后果通常高度不确定，甚至可能非常严重。该建模工具可帮助SNWA识别关键水质威胁并确定其优先级，并开发针对饮用水供应最重大风险的响应和适应方案。建模用于选择新的进水口，并评估废水排放的影响。

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