*3.5. Most Relevant Institutions in Research on SI*

Table 6 shows the main characteristics of the institutions with the highest number of articles on SI. The Chinese Academy of Sciences holds the first position with 14 articles. This institution has accumulated a total of 376 citations in these articles, with an average of 26.9 citations per article and an H index of 7. The institution with the second largest number of articles is the Commonwealth Scientific and Industrial Research Organisation—Land and Water (CSIRO Land and Water), with a total of 12 studies published. It has 212 citations, an average of 17.7 citations per article, and an H index of 8. In third place is the University of South Australia, with 10 articles. This institution has accumulated a total of 24 citations, an average of 2.4 citations per article, and an H index of 3. The institution with the largest number of citations and the highest average citations per article in its studies on SI is the University of Texas, with a total of 562 citations and 93.7 citations per article.

With respect to the international collaboration of institutions, the average percentage of articles carried out jointly was 46.6%. The institutions with the highest percentage of articles carried out in collaboration were the IHE Delft Institute for Water Education and the Universidade de Lisboa (University of Lisbon) with 83.3%. These two institutions were followed by the University of South Australia with 80.1%, Columbia University with 75.1%, China Agricultural University and Texas A and M University with 66.7%, and the University of California with 62.5%. The average number of citations of the jointly-written articles of the group of 22 institutions was 18.3 as opposed to 16.7 citations for the rest. The institutions with the highest number of citations in articles written in collaboration were the University of Texas, the University of California, and China Agricultural University.


**Table 6.** Main characteristics of the most active institutions related to SI research.

<sup>1</sup> The total number of citations divided by the total number of articles; <sup>2</sup> only sample documents; <sup>3</sup> the number of articles produced through international collaboration divided by the total number of articles; <sup>4</sup> the number of citations obtained by articles produced through international collaboration divided by the number of articles; <sup>5</sup> the number of citations obtained for articles not made through international collaboration divided by the number of articles.
