This map shows the geographic impact of P. E. Clopper's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by P. E. Clopper with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites P. E. Clopper more than expected).
This network shows the impact of papers produced by P. E. Clopper. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by P. E. Clopper. The network helps show where P. E. Clopper may publish in the future.
Co-authorship network of co-authors of P. E. Clopper
This figure shows the co-authorship network connecting the top 25 collaborators of P. E. Clopper.
A scholar is included among the top collaborators of P. E. Clopper based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with P. E. Clopper. P. E. Clopper is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Arneson, L A, Lyle W. Zevenbergen, P. F. Lagasse, & P. E. Clopper. (2012). Evaluating Scour at Bridges, Fifth Edition. Research Repository (Delft University of Technology). 60(7). 804–809.24 indexed citations
Lagasse, P. F., et al.. (2009). Bridge Scour and Stream Instability Countermeasures: Experience, Selection and Design Guidance. Third Edition. Volume 1.11 indexed citations
9.
Lagasse, P. F., et al.. (2007). Countermeasures to Protect Bridge Piers from Scour. National Cooperative Highway Research Program report.53 indexed citations
10.
Zevenbergen, Lyle W., P. F. Lagasse, & P. E. Clopper. (2007). Effects of Debris on Bridge Pier Scour. World Environmental and Water Resources Congress 2007. 1–10.38 indexed citations
11.
Lagasse, P. F., P. E. Clopper, Lyle W. Zevenbergen, & James F. Ruff. (2006). Riprap Design Criteria, Recommended Specifications, and Quality Control. National Cooperative Highway Research Program report.24 indexed citations
Lagasse, P. F., et al.. (2001). Bridge Scour and Stream Instability Countermeasures. Experience, Selection, and Design Guidance. Second Edition..4 indexed citations
14.
Lagasse, P. F., et al.. (1997). Bridge Scour and Stream Instability Countermeasures: Experience, Selection and Design Guidance.60 indexed citations
15.
Clopper, P. E.. (1991). Protecting embankment dams with concrete block systems.10 indexed citations
16.
Sanders, Taren, Steven R. Abt, & P. E. Clopper. (1990). A quantitative test of erosion control materials. 209–220.1 indexed citations
Clopper, P. E., et al.. (1988). Minimizing embankment damage during overtopping flow.9 indexed citations
19.
Clopper, P. E., et al.. (1987). Predicting and Minimizing Embankment Damage Due to Flood Overtopping. Hydraulic Engineering. 751–757.1 indexed citations
20.
Clopper, P. E., et al.. (1983). A Data-Based Evaluation of the Curve Number Method. 290–297.1 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.