PREDIKSI EROSI DAN SEDIMENTASI PADA BERBAGAI PENGGUNAAN LAHAN DI SUB DAS DANAU LIMAU MANIS PADA DAS KURANJI KOTA PADANG



DOI: https://doi.org/10.25077/js.7.1.61-67.2010

Aprisal Aprisal *  (Ilmu Tanah Fakultas Pertanian Universitas Andalas Padang)
Junaidi Junaidi (Ilmu Tanah Fakultas Pertanian Universitas Andalas Padang)

(*) Corresponding Author

Abstract


Erosion prediction and sedimentation measurement in sub-watershed Danau Limau Manis was conducted to predict erosion and sedimentation from several land uses there, as well as to find out other types of land use being able to reduce erosion as tolerated one.   Methods used for this research was divided into {1) soil map analyses(topography and land use), rainfall data, (2) survey and soil sampling in the field, (3) soil analyses in laboratory, and (4) data analyses using erosion model “USLE” and “Sediment Delivery Ratio”.  The results showed that there 4 types of land use (mixed garden, settlement, farming, and bush) having erosion higher than tolerated erosion(etol).  This was due to low plant density and many areas open, therefore, rainfall will directly struck soil aggregates causing dispersion. To eliminate or reduce the erosion rate into etol could be done by “agroecotechnology conservation”method.  That is by increasing plant density,  changing bush land into garden so that the crop coefficient will became 0.001.  While at settlement area, it should be planted by perennial trees, built terrace and water ditch.  Garden and bush land contributed highest amount of sediment, however it can be reduced if agroecotechnology conservation method is applied.

Key word: watershed, erosion, sedimentation

Copyright (c) 2017 Jurnal Solum


Full Text:

PDF

References


Arsyad, S., 1989. Konversi Tanah dan Air. Penerbit IPB (IPB Press) Bogor.

Arsyad, S., A. Priyanto dan L. I. Nasution, 1985. Pengembangan Daerah Aliran

Sungai. Lokakarya Pengembangan Program Studi Pengelolaan DAS. FPS IPB Bogor.

Robinson, A. R. 1979. Sediment Yield as a Function of Upstream Erosion. SSSASpecial Pub. : 7-16.

Hamer, W. I. 1982. Final Soil Conversation Consultant Report. Tech. Note No. 26 Centre for Soil Research, Bogor.

Morgan, R. P. C. 1979. Soil Erosion. Longman Group Ltd., New York.

Wischmeier, W. H. and D. P. Smith, 1978. Predicting Rainfall Erosion Losses A Guide to Conversation Planning USDA Agric. Handbook No. 53.

Wooldrige, D.D. 1964. Effect of parent material and vegetation of properties to soil in central washington. Soil Science Society American Procceding. No 28. p. 430-442.


StatisticsArticle Metrics

This article has been read : 563 times
PDF file viewed/downloaded : 22 times

Copyright (c) 2017 Jurnal Solum



ISSN: 2356-0835