Schueler, Thomas R. The Importance of Imperviousness. Schueler; Holland, Heather K. (编). The Practice of Watershed Protection. Ellicott City, MD: Center for Watershed Protection. 2000: 1–12 [initial publ. 1995] [2014-12-24]. (原始内容(pdf)存档于2014-03-27).
Ch. 3. Channelization and Channel Modification. National Management Measures to Control Nonpoint Source Pollution from Hydromodification (报告). EPA. 2007 [2023-05-10]. EPA 841-B-07-002. (原始内容存档于2016-08-08).
Schueler, Thomas R. The Importance of Imperviousness. Schueler; Holland, Heather K. (编). The Practice of Watershed Protection. Ellicott City, MD: Center for Watershed Protection. 2000: 1–12 [initial publ. 1995] [2014-12-24]. (原始内容(pdf)存档于2014-03-27).
Ch. 3. Channelization and Channel Modification. National Management Measures to Control Nonpoint Source Pollution from Hydromodification (报告). EPA. 2007 [2023-05-10]. EPA 841-B-07-002. (原始内容存档于2016-08-08).