ISSN:0020-6024    

DOI:10.1080/02626666909493748

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666909493749

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666909493750

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

This study of longitudinal stream profiles of rivers of the Midcontinent (rivers tributary to the Mississippi) and Atlantic and East Gulf Slopes has revealed five types of longitudinal profiles: (1) Overall concave-upward profiles with or without long constant slope segments; (2) convex upward, for example, the Missouri River has a profile that has a constant slope for its lower 560 miles and then is convex upward with constant slope segments to a point beyond the Yellowstone River junction; (3) concave-upward irregular, ungraded, low-gradient profiles (Ohio and Tennessee Rivers); (4) irregular unsegmented and steep profiles, such as shown by the Delaware and Savannah-Tugaloo Rivers; and (5) irregular ungraded, steep-gradient profiles that are concave-upward in the upstream reaches and downstream convex-upward, for example, on most of the Atlantic Slope and East Gulf Slope Rivers above the Fall Line. Constant slope profiles occur where the last type of rivers flow across relatively weak Coastal Plain sediments and also inland on the Coosa and Oostanaula-Conasauga Rivers. The profile characteristics of the Atlantic and East Gulf streams lend support to the hypothesis of multiple erosion cycles in the Appalachians.

ISSN:0020-6024    

DOI:10.1080/02626666909493751

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666909493752

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

Che Ju Do is a volcanic island off shore from the Korean Peninsula. The island is an extinct volcano, petrologically a part of the intra-pacific province of the olivine-basalt-trachyte association. The last volcanic activity has been reported in old manuscripts.

ISSN:0020-6024    

DOI:10.1080/02626666909493753

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666909493754

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666909493755

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

Cross-spectral characteristics of the moving average and autoregressive processes are shown to be a powerful tool in testing and analyzing these types of generating processes in hydrology. Special significance has the coherence between two 1st order autoregressive processes which is shown to be equal to a constant independent of frequency.

ISSN:0020-6024    

DOI:10.1080/02626666909493756

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

Mean flow of a stream is usually computed from a continuous record of flow ai a gaging station. A less costly method consists of (1) estimating 12 individual monthly flows from one discharge measurement per month and a concurrent gaging station record on a nearby stream, using a different relation for each month, (2) computing the annual mean from the estimated monthly means, and (3) using a relation based on gaging station records to estimate the long-term mean from the one annual mean. An annual mean can be estimated within about 10 percent of its measured value even though both the gaged and ungaged streams are affected by diversions and have different runoff characteristics. The method has greatest utility in regions where mean runoff is not closely related to drainage area.

ISSN:0020-6024    

DOI:10.1080/02626666909493757

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor