کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8894901 | 1629893 | 2018 | 51 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
SSEM: A model for simulating runoff and erosion of saline-sodic soil slopes under coastal reclamation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: SSEM: A model for simulating runoff and erosion of saline-sodic soil slopes under coastal reclamation SSEM: A model for simulating runoff and erosion of saline-sodic soil slopes under coastal reclamation](/preview/png/8894901.png)
چکیده انگلیسی
Current physically based erosion models do not carefully consider the dynamic variations of soil properties during rainfall and are unable to simulate saline-sodic soil slope erosion processes. The aim of this work was to build upon a complete model framework, SSEM, to simulate runoff and erosion processes for saline-sodic soils by coupling dynamic saturated hydraulic conductivity Ks and soil erodibility KÏ. Sixty rainfall simulation rainfall experiments (2 soil texturesâ¯Ãâ¯5 sodicity levelsâ¯Ãâ¯2 slope gradientsâ¯Ãâ¯3 duplicates) provided data for model calibration and validation. SSEM worked very well for simulating the runoff and erosion processes of saline-sodic silty clay. The runoff and erosion processes of saline-sodic silt loam were more complex than those of non-saline soils or soils with higher clay contents; thus, SSEM did not perform very well for some validation events. We further examined the model performances of four concepts: Dynamic Ks and KÏ (Case 1, SSEM), Dynamic Ks and Constant KÏ (Case 2), Constant Ks and Dynamic KÏ (Case 3) and Constant Ks and Constant KÏ (Case 4). The results demonstrated that the model, which considers dynamic variations in soil saturated hydraulic conductivity and soil erodibility, can provide more reasonable runoff and erosion prediction results for saline-sodic soils.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 561, June 2018, Pages 960-975
Journal: Journal of Hydrology - Volume 561, June 2018, Pages 960-975
نویسندگان
Dongdong Liu, Dongli She,