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首頁> 外文OA文獻(xiàn) >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(jī)譯：美利堅(jiān)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(xué)對地表水水質(zhì)的影響。

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摘要

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 NO?-N levels. In contrast, solute concentrations during the monsoon season indicated all regions were hydrologically linked. DOM and NO?-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(jī)譯：這項(xiàng)研究的目的是檢驗(yàn)半干旱流域土地利用和水文學(xué)對地表水質(zhì)量的影響。在2002年季風(fēng)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(jìn)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(zhì)，營養(yǎng)物和有機(jī)物。在非季風(fēng)基流時期，保守的溶質(zhì)表明區(qū)域之間的水文聯(lián)系有限。受保護(hù)河段的DOC濃度明顯較高，而農(nóng)業(yè)河段的DON和NO?-N水平則明顯較高。相反，季風(fēng)季節(jié)的溶質(zhì)濃度表明所有地區(qū)在水文上都有聯(lián)系。隨著地面衍生的溶質(zhì)被沖入流中，DOM和NO 3-N濃度增加。營養(yǎng)負(fù)荷是可變的，這表明營養(yǎng)物濃度的變化與單個范圍有關(guān)。這項(xiàng)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(zhì)的重要控制。

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    Lemon Michelle M.;

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  • 年度 2004
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