How to find the intersection points of two curves and exchange their data beyond these points?

Hi, guys.

I have a matrix data consisting of x and y that can be used to plot different curves. But there are many intersection points between these curves, as shown in Fig. 1 and Fig. 2. Is it possible to remove these intersection ponints and make these curves varying approximately linearly with x?

Thanks.

Here is the data file.

[Image Analyst]

Attach your data file.

Attach a picture of what you'd like to achieve.

[ZhiH]

Thanks @Image Analyst. I want the smooth curves that vary approximately linearly with x at the intersection region, as shown below in Fig. 3.