The following is the first draft of an academic paper. Please help me polish the language.
<3 Results
4.2 Filtration mechanism for woven geotextile
Picture of the woven geotextile after the test is shown in Figure 12. The flat wire woven geotextile had a thin thickness, and the water passages of the geotextile was the intersection of two vertically intersecting flat wires. Hence the water passages did not directly face the sand. It is found that the clogged sand particles were mainly distributed at the horizontal water passages of the woven geotextile, reducing the drainage capability of the woven geotextile. With the further development of physical clogging, the clogged substances may completely block the water passages of the woven geotextile, making the geotextile filter ineffective.
After the test, the geotextiles were dried and weighed, and the mass of the woven geotextile and nonwoven geotextile increased by 0.86 g and 0.27 g, respectively. The increase in mass of the woven geotextile was larger than that of the nonwoven geotextile, indicating more clogged particles in the woven geotextile. Based on the above experimental results, it can be concluded that the woven geotextile used in this study was prone to clogging in the preventing BEP, and it was not suitable for emergency rescue of dike BEP.
 
Figure 12. Picture of clogged woven geotextiles in Test-5
5 Discussions
The pore size and thickness of geotextiles have an important impact on their filtration properties during preventing BEP. The pore size of the 200 g/m2 nonwoven geotextile was the largest (O95=0.106 mm), and its stable GR value was 2.60, which was less than 3.0, indicating no significant clogging occurred. In addition, its flow rate was larger compared to that of 300 g/m2 and 400 g/m2 nonwoven geotextile, showing a good filtration performance. The O95 of the 300 g/m2 nonwoven geotextile was 0.051 mm, and  the GR value was 3.98 at the end of the experiment, indicating significant clogging occurred. Although the pore size of the 400 g/m2 nonwoven geotextile was also small (O95=0.047 mm), its thickness was greater than that of the 300 g/m2 nonwoven geotextile, hence its stable GR value was less than 3.0. The thicker thickness of the nonwoven geotextile provides it more seepage paths, which in turn has a stronger resistance to physical clogging, and previous research have also confirmed this opinion17. However, due to the smallest permeability coefficient of the 300 g/m2 nonwoven geotextile, its seepage discharge was also the lowest. Increasing the thickness and the pore size of the nonwoven geotextile within a certain range help to improve filtration performance20.
It is found that the fiber weaving type of the geotextile has an important influence on the filtration properties of geotextiles during preventing BEP. The flat wire woven geotextile was clogged during the experiment (GR25=10.4), and its seepage capacity significantly decreased, indicating that it was unsuitable for emergency rescue of dike BEP. At the end of the experiment, the flow rate of the woven geotextile decreased by 42%, and its flow rate was 53.8% lower than that of the 200 g/m2 nonwoven geotextile. By analyzing the magnified image of the woven geotextile after the experiment, it is found that the main mechanism of physical clogging was fine sand blocking its horizontal water passages, reducing the water passage area. This type of geotextile has a thin thickness, hence its permeability would be greatly affected once the limited water passages are blocked.

6 Conclusions
(1) The filtration performance of nonwoven geotextiles is better to that of woven geotextiles in emergency rescue of dike BEP, and the 200 g/m2 nonwoven geotextile showed best filtration performance compared to other geotextiles used in medium sand. Increasing the thickness and the pore size of nonwoven geotextiles within a certain range help to enhance their anti-clogging ability.
(2) With the increase in pore size of nonwoven geotextiles, the drainage capability of the filter layer significantly enhanced. Clogging particles were mainly distributed on the surface of the nonwoven geotextile rather than inside it. The main clogging mechanism of nonwoven geotextile is the deposition of fine sand particles on its surface, forming a thin layer of soil with a low permeability.
(3) Flat wire woven geotextiles experienced severe clogging and had a low flow rate, making them unsuitable for emergency rescue of dike BEP. The clogging mechanism of this type of geotextile is the occupation of the horizontal water passages by clogging sand particles.>