Relationship of Land‐Use/Land‐Cover Patterns and Surface‐Water Quality in The Mullica River Basin 1
Relationship of Land‐Use/Land‐Cover Patterns and Surface‐Water Quality in The Mullica River Basin 1
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DOI：
10.1111/j.1752-1688.2007.00045.x
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发表时间：
2007-06
期刊：
影响因子：
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通讯作者：
R. A. Zampella;N. Procopio;R. Lathrop;C. Dow
中科院分区：
文献类型：
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作者：
R. A. Zampella;N. Procopio;R. Lathrop;C. Dow
摘要：我们描述了新泽西州松林地主要流域穆利卡河流域的 pH、电导率、钙、镁、氯化物、硫酸盐、氮和磷与土地利用模式之间的关系，并确定了水质发生重大变化的阈值。非点源是流域地表水污染物的主要来源。利用 25 个河流地点的多元回归和水质数据，我们确定了由城市土地和高地农业解释的水质数据变化的百分比，并评估这些土地利用的邻近性是否影响水质/土地利用关系。我们使用第二个独立收集的水质数据集来验证统计模型。多重回归结果表明，研究区的水质退化与全流域的高地土地利用有关，而高地土地利用通常是水质状况的良好预测因子，并且模型中必须包含城市土地和高地农业，以更全面地描述流域扰动与水质之间的关系。包括土地利用的邻近性并没有改善土地利用和水质之间的关系。流域内 10% 的土地覆盖变化代表穆利卡河流域发生与参考点水质条件显着偏差的阈值。
Abstract: We describe relationships between pH, specific conductance, calcium, magnesium, chloride, sulfate, nitrogen, and phosphorus and land‐use patterns in the Mullica River basin, a major New Jersey Pinelands watershed, and determine the thresholds at which significant changes in water quality occur. Nonpoint sources are the main contributors of pollutants to surface waters in the basin. Using multiple regression and water‐quality data for 25 stream sites, we determine the percentage of variation in the water‐quality data explained by urban land and upland agriculture and evaluate whether the proximity of these land uses influences water‐quality/land‐use relationships. We use a second, independently collected water‐quality dataset to validate the statistical models. The multiple‐regression results indicate that water‐quality degradation in the study area is associated with basin‐wide upland land uses, which are generally good predictors of water‐quality conditions, and that both urban land and upland agriculture must be included in models to more fully describe the relationship between watershed disturbance and water quality. Including the proximity of land uses did not improve the relationship between land use and water quality. Ten‐percent altered‐land cover in a basin represents the threshold at which a significant deviation from reference‐site water‐quality conditions occurs in the Mullica River basin.