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Assessment of stream flow response to rainfall and water quality within a small tropical watershed in southwest Costa Rica.

机译：在哥斯达黎加西南部的一个热带小流域内，评估河流流量对降雨和水质的响应。

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The objective of this study was to characterize a small tropical watershed in Costa Rica that contains land-uses including pasture, secondary forest, and primary forest. Precipitation, discharge, and water quality were monitored between June 2008 and May 2009. Soil permeability was also evaluated within the different land-uses. Hydraulic conductivity values were greatest in the pasture followed by the primary forest and the secondary forest. This is inconsistent with studies that document decreased permeability with increased land-use intensity. Mean response lags were longest in sub-catchments containing primary forests. Antecedent moisture conditions had a strong impact on the timing characteristics of stream response and the balance of storm flow and baseflow. pH and TDS/EC were consistently the lowest within the sub-catchments dominated by primary forests. Temporal trends correlated with precipitation. TSS/Q plotted as positive hysteresis loops suggesting that suspended sediment was depleted rapidly as it was flushed from near channel areas.

机译：这项研究的目的是描绘哥斯达黎加的一个热带小流域，其中包括牧场，次生林和原始林等土地利用。在2008年6月至2009年5月期间监测了降水，排放和水质。还对不同土地利用范围内的土壤渗透性进行了评估。牧场的水力传导率值最大，其次是原始林和次生林。这与证明渗透性随土地利用强度增加而降低的研究不一致。在包含原始森林的小流域，平均响应滞后时间最长。前期的水分条件对河流响应的时间特征以及暴雨和底流的平衡有很大的影响。 pH和TDS / EC始终是主要森林支配的次流域中最低的。时间趋势与降水相关。 TSS / Q显示为正滞后回线，表明悬浮的沉积物在从通道附近冲刷时迅速耗尽。

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作者
Catalfamo, Stephen Edward.;
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作者单位

State University of New York at Binghamton.;

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授予单位 State University of New York at Binghamton.;
学科 Geology.;Hydrology.
学位 M.S.
年度 2010
页码 200 p.
总页数 200
原文格式 PDF
正文语种 eng
中图分类水产、渔业;
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Assessment of stream flow response to rainfall and water quality within a small tropical watershed in southwest Costa Rica.

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