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首頁> 外文學位 >The effects of land use and regional hydrology on surface water quality in the upper San Pedro River, Arizona, United States of America.
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The effects of land use and regional hydrology on surface water quality in the upper San Pedro River, Arizona, United States of America.

機譯：美利堅合眾國亞利桑那州圣佩德羅河上游的土地利用和區(qū)域水文學對地表水水質的影響。

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The purpose of this study is to examine the effects of land use and hydrology on surface water quality in a semi-arid watershed. Six synoptic sampling events were performed along the upper San Pedro River, AZ, USA before, during, and after the 2002 monsoon season. Water samples were analyzed for conservative solutes, nutrients, and organic matter. During non-monsoon baseflow periods, conservative solutes indicated limited hydrologic connection between regions. Protected reaches had significantly higher DOC concentrations and agricultural reaches had significantly higher DON and NO3-N levels. In contrast, solute concentrations during the monsoon season indicated all regions were hydrologically linked. DOM and NO3-N concentrations increased as terrestrially derived solutes were flushed into the stream. Nutrient loads were variable suggesting that changes in nutrient concentrations were related to individual reaches. This research demonstrates that hydrologic flowpaths and land cover are important controls on surface water quality at the reach and river scales.
機譯：這項研究的目的是檢驗半干旱流域土地利用和水文學對地表水質量的影響。在2002年季風季節(jié)之前，期間和之后，在美國亞利桑那州圣佩德羅河上游進行了六次天氣概要采樣事件。分析了水樣品中的保守性溶質，營養(yǎng)物和有機物。在非季風基流時期，保守的溶質表明區(qū)域之間的水文聯系有限。受保護河段的DOC濃度明顯較高，而農業(yè)河段的DON和NO3-N水平則明顯較高。相反，季風季節(jié)的溶質濃度表明所有地區(qū)在水文上都有聯系。隨著陸生溶質被沖入流中，DOM和NO3-N濃度增加。營養(yǎng)負荷是可變的，這表明營養(yǎng)物濃度的變化與單個范圍有關。這項研究表明，水文流徑和土地覆蓋是控制河段和河流尺度地表水水質的重要控制。

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