传统方法计算水文地质参数的局限性

2025-04-03 19:29:22
推荐回答(1个)
回答1:

如前所述,利用泰斯公式计算含水层参数传统的方法有配线法——又称为标准曲线对比法,还有直线图解法。其中的配线法又分为降深—时间配线法、降深—时间、距离配线法等多种。这些方法对于计算含水层参数是行之有效的,解决了由于把抽水试验资料直接代入泰斯公式计算含水层参数时难以逾越的繁琐计算的难题。用配线法代替了繁琐的计算,使含水层参数的确定得以完成。

但是,这种配线法有着很大的局限性,配线法求参数都需要在透明的对数坐标纸上把抽水试验资料按照相应的标准曲线的形式绘制成曲线,再与标准曲线进行对比,找出包括待求参数的几个关系式,然后再计算出参数之值[1]。属于直线图解法的s-lgt直线图解法、s-lg(t/r2)直线图解法等多种,也都需要在单对数坐标纸上把抽水试验资料绘制成相应的曲线,找出包括待求参数的几个关系式,然后再计算出参数之值。

可以看出,无论是配线法还是直线图解法,都需要先把抽水试验资料在坐标纸上绘制成相应的曲线,然后再找出几个关系式,最后再计算出待求的参数之值。这些绘制曲线的工作完全是手工劳动,计算过程完全依靠人的双手绘点、连线、配线、记录数据、代入公式计算,不但步骤烦琐、工作量大、工作效率低,难以实现批量化、自动化生产,而且抽水试验资料绘制曲线、配线、找点等过程中,人为误差难以避免,有出现错误的可能。

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