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تحلیل مقایسه‌ای اثر شدت باران و شیب پلات‌های آزمایشگاهی بر مؤلفه‌های فرسایش ناشی از اثر قطره‌های باران (RIIE) | ||
| تحقیقات آب و خاک ایران | ||
| مقاله 5، دوره 46، شماره 4، دی 1394، صفحه 631-640 اصل مقاله (531.71 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ijswr.2015.56787 | ||
| نویسندگان | ||
| محبوبه کیانی هرچگانی1؛ سیدحمیدرضا صادقی* 2؛ حسین اسدی3 | ||
| 1دانشجوی دکتری گروه مهندسی آبخیزداری، دانشکدة منابع‌طبیعی و علوم دریایی، دانشگاه تربیت مدرس، مازندران، نور | ||
| 2استاد گروه مهندسی آبخیزداری، دانشکدة منابع‌طبیعی و علوم دریایی، دانشگاه تربیت مدرس، مازندران، نور | ||
| 3دانشیار گروه علوم خاک، دانشگاه گیلان | ||
| چکیده | ||
| جدایش پاشمانی و انتقال ذرات خاک به‌وسیلة اثر قطره‌های باران در خاک سطحی شروع روند فرسایش آبی محسوب می‌شود. این در حالی است که به تحلیل فرایندی و اثر عوامل مختلف روی آن کمتر توجه شده است. به‌همین منظور پژوهش حاضر با هدف تحلیل مقایسه‌ای اثر شیب و شدت باران بر مؤلفه‌های فرسایش ناشی از اثر قطره‌های باران (RIIE) در خاک لوم رسی شنی در مقیاس آزمایشگاهی برنامه‌ریزی شد. برای این کار، 81 آزمایش شبیه‌سازی بارش در پلات‌های 1×6 متر در شیب‌های 5، 15 و 25 درصد متناسب با شرایط فعلی منطقه و در شدت‌های 30، 60 و 90 میلی‌متر بر ساعت با استفاده از منحنی شدت، مدت و فراوانی منطقه و در سه تکرار با شبیه‌ساز باران و در بالادست و پایین‌دست فنجان پاشمان مورگان و در سه موقعیت بالادست، وسط و پایین‌دست پلات‌ها صورت گرفت. طبق نتایج پژوهش حاضر، تأثیرپذیری تمامی متغیرهای مورد بررسی شامل پاشمان بالادست و پایین‌دست و پاشمان کل و خالص ناشی از شدت بارش و تغییرات مکانی در سطح 99 درصد معنا‌دار بود. تنها تأثیر تغییرات مکانی بر پاشمان خالص معنا‌دار نبود (13/0 ≥ P). همچنین تحلیل نتایج، بر نبود اثر معنا‌دار شیب بر متغیرها (11/0 ≥ P) به جز پاشمان خالص (01/0 P ≤) دلالت داشته است. | ||
| کلیدواژه‌ها | ||
| خاک؛ شبیه‌ساز باران؛ عوامل فرسایش؛ فرسایش بارانی؛ فرایند فرسایش | ||
| عنوان مقاله [English] | ||
| Comparative Analysis of the Effects of Rainfall Intensity and Experimental Plot Slope on Raindrop Impact Induced Erosion (RIIE) | ||
| نویسندگان [English] | ||
| Mahboobeh Kiani Harchegani1؛ Seyed Hamid Reza Sadeghi2؛ Hossein Asadi3 | ||
| 1PhD candidate, Department of Watershed Management Engineering, College of Natural Resources, Tarbiat Modarres University, Noor, Mazandaran, Iran | ||
| 2Professor, Department of Watershed Management Engineering, College of Natural Resources, Tarbiat Modarres University, Noor, Mazandaran, Iran | ||
| 3Associate Professor, Department of Soil Science, University of Guilan | ||
| چکیده [English] | ||
| Splash detachment and transport of soil particles through the impact of raindrops on the soil surface form the initiating mechanisms of water erosion. However, mechanistic analysis of different affecting factors has less been taken into account. The present study was therefore formulated for a comparative analysis of the effective intensities as well as slopes on Raindrop Impact Induced Erosion (RIIE) components within a laboratory scale and for a sandy clay loam soil. Towards this end, a total of 81 rainfall simulation experiments were conducted in a set of 1 × 6 m plots with varying slopes of 5, 15 and 25% while using the current situation prevalent in the region. The experiments were performed in three replications and with simulated rainfall intensities of 30, 60, and 90 mm h-1 using region IDF. The experiments were also adopted while using rainfall simulation system along with upward as well as downward Morgan’s splash cups placed at upper, middle and lower parts of the plot. Results indicated that all the study variables viz. total vs net splash and upward downward splash were significantly (p ≤ 0.01) influenced by rainfall intensity and cups' locality, but net splash was not statistically influenced (p ≥ 0.13) by spatial variation of cups. In addition, the results showed that slope did not affect any study variables (p ≥ 0.11) except the phenomenon of net splash (p ≤ 0.01). | ||
| کلیدواژه‌ها [English] | ||
| Erosion factors, Rainfall erosion, Rainfall simulator, Soil erosion process | ||
| مراجع | ||
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Abdollahi, Z., Sadeghi, S. H. R. and Khaledi Darvishan, A. V. (2013). Designing, manufacturing and testing rainfall simulator nozzles. Water and Soil Conservation, 20(6): 67-86. (In Farsi)
Agassi, M. and Bradford, J. M. (1999). Methodologies for Interrill Soil Erosion Studies. Soil and Tillage Research, 49(4), 277-287.
Armstrong, A., Quinton, J. N., Heng, B. C. P. and Chandler, J. H. (2011). Variability of interrill erosion at low slopes. Earth Surface Processes and Landforms, 36(1), 97-106.
Barry, D. A., Sander, G. C., Jomaa, S., Heng, B. C. P., Parlange, J. Y., Lisle, I. G. and Hogarth, W. L. (2010). Exact solutions of the Hairsine-Rose precipitation-driven erosion model for a uniform grain size soil. Journal of Hydrology, 389 (3–4), 399–405.
Ben-Hur, M. and Agassi, M. (1997). Predicting interrill erodibility factor from measured infiltration rate. Water Resources Research, 33, 2409–2415.
Bhattacharyya, R., Fullen, M. A., Davies, K. and Booth, C. A. (2010). Use of palm-mat geotextiles for rainsplash erosion control. Geomorphology, 119, 52–61.
Brodowski, R. (2013). Soil detachment caused by divided rain power from raindrop parts splashed downward on a sloping surface. Catena, 105, 52– 61.
Bryan, R B. (1979). The influence of slope angle on soil entrainment by sheetwash and rainsplash. Earth Surface Processes, 4, 43–58.
Defersha, M. B., Quraishi, S. and Melesse, A., (2011). The effect of slope steepness and antecedent moisture content on interrill erosion, runoff and sediment size distribution in the highlands of Ethiopia. Hydrology and Earth System Sciences, 15(7), 2367-2375.
Defersha, M. B., and Melesse, A. M. (2012). Effect of rainfall intensity, slope and antecedent moisture content on sediment concentration and sediment enrichment ratio. Catena, 90, 47-52.
Ekern, P. C. (1950). Raindrop impact as a force initiating soil erosion. Soil Science Society of America Proceedings, 15, 7–10.
Ellison, W. D. (1944). Studies of raindrop erosion. Agricultural Engineering, 25 (4), 131–136.
Fan, J. C. and Wu, M. F. (1999, May). Effects of soil strength, texture, slope steepness and rainfall intensity on interrill erosion of some soils in Taiwan. In10th International Soil Conservation Organization meeting, Purdue University, USDA-ARS national soil erosion research laboratory.
Foster, G. R., Meyer, L. D. and Onstad, C. A. )1977(. An erosion equation derived from basic erosion principles. Transactions of the American Society of Agricultural Engineers, 20, 678–682.
Fu, S., Liu, B., Liu, H. and Xu, L. (2011). The effects of slope on interrill erosion at short slopes. Catena, 84, 29-34.
Gerits, J. J. P., De Lima, J. L. M. P. and van Den Broek, T. M. W. (1990). Overland flow and erosion. Process Studies in Hillslope Hydrology, 173–214.
Goebes, P., Seitz, S., Geißler, C., Lassu, T., Peters, P., Seeger, M., Nadrowski, K. and Scholten, T. (2014). Momentum or kinetic energy – How do substrate properties influence the calculation of rainfall erosivity? Journal of Hydrology, 517, 310–316.
Hairsine, P. B. and Rose, C. W. (1991). Rainfall detachment and deposition: sediment transport in the absence of flow-driven processes. Soil Science Society of America Journal, 55, 320–324.
Hawke, R. M., Price, A. G. and Bryan, R. B. (2006). The effect of initial soil water content and rainfall intensity on near-surface soil hydrologic conductivity: a laboratory investigation. Catena, 65(3), 237-246.
Janeau, J. L., Bricquet, J. P., Planchon, O. and Valentin, C. (2003). Soil crusting and infiltration on steep slopes in northern Thailand. European Journal of Soil Science, 54, 543–553.
Khaledi Darvishan, A., Sadeghi, S. H. R., Homaee, M. and Arabkhedri, M. (2014). Measuring sheet erosion using synthetic color contrast aggregates. Hydrological Processes, 28(15), 4463-4471.
Kinnell, P. I. A. (2005). Raindrop impact induced erosion processes and prediction: A review. Hydrological Processes, 19, 2815–2844.
Kinnell, P. I. A. (2009). The influence of raindrop induced saltation on particle size distributions in sediment discharged by rain-impacted flow on planar surfaces. Catena, 78: 2–11.
Kinnell, P. I. A. (2012). Raindrop induced saltation and enrichment of sediment discharged from sheet and interrill erosion areas. HydrologicalProcesses, 26(10), 1449-1456.
Kukal, S. S. and Sarkar, M. (2011). Laboratory simulation studies on splash erosion and crusting in relation to surface roughness and raindrop size. Journal of the Indian Society of Soil Science, 59(1), 87-93
Legout, C., Leguédois, S., Le Bissonnais, Y. and Malam Issa, O. (2005). Splash distance and size distributions for various soils. Geoderma, 124, 279–292.
Liu, D., She D., Shao, G. and Chen, D. (2015). Rainfall intensity and slope gradient effects on sediment losses and splash from a saline–sodic soil under coastal reclamation. Catena, 128, 54-62.
Misra, R. K. and Rose, C. W. (1995). An examination of the relationship between erodibility parameters and soil strength. Australian Journal of Soil Research, 33: 715–732.
Montenegro, A. A. A., Abrantes, J. R. C. B., de Lima, J. L. M. P., Singh, V. P. and Santos, T. E. M. (2013). Impact of mulching on soil and water dynamics under intermittent simulated rainfall. Catena, 109, 139–149.
Morgan, R. P. C. (1978). Field studies of rainsplash erosion. Earth Surface Processes, 3, 295–299.
Poesen, J. and Torri, D. (1988). The effect of cup size on splash detachment and transport measurements; part I: field measurements. Geomorphic processes in environments with strong seasonal contrasts. Vol. I. Hillslope processes., Catena Supplement, 12, 113-126.
Sadeghi, S. H. R., Abdollahi, Z. and Khaledi Darvishan, A. V. (2013). Experimental comparison of some techniques for estimating Natural Rain Drop Size Distribution in Caspian Sea Southern Coast, Iran. Hydrological Sciences Journal, 58(6): 1374-1382.
Salles, C. and Poesen, J. (1999). Performance of an optical spectro pluviometer in measuring basic rain erosivity characteristics. Journal of Hydrology, 218, 142–156.
Shi, Z. H., Yue, B. J., Wang, L., Fang, N. F., Wang, D., and Wu, F. Z. (2013). Effects of mulch cover rate on interrill erosion processes and the size selectivity of eroded sediment on steep slopes. Soil Science Society of America Journal, 77(1), 257-267.
Terry, J. P. (1998). A rain splash component analysis to define mechanisms of soil detachment and transportation. Australian Journal of SoilResearch, 36, 525–542.
Torri, D. and Poesen, J. (1992). The effect of soil surface slope on raindrop detachment. Catena, 19, 561–578.
Valettea, S., Prevosta Laurent, L. and Lucasa, J. (2006). SoDA project: A simulation of soil surface degradation by rainfall. Gilles Computers & Graphics, 30, 494–506
Yusefi, A., Farrokhian Firouzi, A. and Khalili Moghadam, B. (2014). Evaluation of temporal variation of splash erosion in different slopes and agricultural and forest land uses. Journal of Soil and Water Resources Conservation, 3(3), 11-20. (In Farsi)
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