Measurement of streambed hydraulic conductivity and its anisotropy
Measurement of streambed hydraulic conductivity and its anisotropy
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DOI：
10.1007/s002540000172
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发表时间：
2000-11
期刊：
影响因子：
--
通讯作者：
Xunhong Chen
中科院分区：
文献类型：
--
作者：
Xunhong Chen
描述了一种测量河床水力传导率的方法。与渗透计方法不同，该方法将直管和l形立管直接应用于河床，测量垂直（Kv）和水平（Kh）方向以及其他倾斜方向（Ks）的原位导水率。该方法在确定 Kv 值方面比粒度分析、渗透仪测试或段塞测试方法具有优势。该方法的另一个独特之处在于它提供了河床的 Ks 值。测量结果可用于构造水力传导率椭圆并评价河床沉积物的各向异性。内布拉斯加州共和河的现场实例证明了该方法在确定沿河道或跨过河道的河床导水率和各向异性方面的有用性。结果表明Khi大约比Kv大三到四倍，而Ks值比Kv大但比Kh小。
A method is described for the measurement of streambed hydraulic conductivity. Unlike permeameter methods, this method applies straight andl-shaped standpipes directly to streambeds for measurements of in-situ hydraulic conductivity in the vertical (Kv) and horizontal (Kh) directions, as well as in other oblique directions (Ks). This method has advantages in determination ofKvvalues over grain-size analysis, permeameter tests, or slug test methods. Also unique to this method is that it providesKsvalues of a streambed. The measured results can be used to construct a hydraulic conductivity ellipse and to evaluate the anisotropy of streambed sediments. Field examples from the Republican River, Nebraska, demonstrated the usefulness of this method in the determination of streambed hydraulic conductivity and anisotropy along or across a river channel. Results indicate that theKhis about three to four times larger thanKv, whereasKsvalues are larger thanKvbut smaller thanKh.