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[1]WANG Guozhong,LI Zhongyuan,QU Jiangang,et al.Under Artificial Rainfall the Changing Law of Pollutants in Runoff in Farmland in Southwest Mountains of Henan Province[J].Research of Soil and Water Conservation,2017,24(04):311-314,323.

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Under Artificial Rainfall the Changing Law of Pollutants in Runoff in Farmland in Southwest Mountains of Henan Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 04 Page number: 311-314,323 Column: Public date: 2017-08-28

Title:: Under Artificial Rainfall the Changing Law of Pollutants in Runoff in Farmland in Southwest Mountains of Henan Province

Author(s):: WANG Guozhong¹, LI Zhongyuan², QU Jiangang³, XU Jianzhao³, YAN Dongfeng⁴; 1. Hydrology and water resources of Yellow River scientific research institute, Zhengzhou 450004, China;
2. Hydrology and water resources bureau in He’nan Province, Zhengzhou 450003, China;
3. Soil and water conservation supervision and inspection station in He’nan Province, Zhengzhou 450008, China;
4. Forestry college of Henan agricultural university, Zhengzhou 450002, China

Keywords:: artificial rainfall; runoff; farmland; nutrient; rainfall intensity

CLC:: X14

DOI:: -

Abstract:: Slope cropland and terrace are common land use types in Danjiangkou reservoir catchment areas and indoor artificial rainfall simulation methods are employed to study nutrients’ changing law of the two soils under different rainfall intensities, so as to prevent nutrients， soil and water erosion, improving farming practices. The results are as follows: (1) the nutrients of TN, TP and COD all have wavily changed in the two kind soils runoff with rainfall time, the TN content are respectively 3.36 mg/L (0.5 mm/min), 5.18 mg/L (2.5 mm/min), 4.27 mg/L (3.0 mm/min) in terrace in different rainfall intensity and the relevant values in hilly land are 2.66 mg/L, 4.56 mg/L, 4.18 mg/L; the TP content are respectively 0.81 mg/L (0.5 mm/min), 0.92 mg/L (2) / 0 mm/min), 1.56 mg/L (2.5 mm/min), 2.53 mg/L (3.0 mm/min) in terrace in different rainfall intensity and the relevant values in hilly land are 0.59 mg/L, 1.03 mg/L, 0.62 mg/L, 2.04 mg/L, which shows TN and TP content in terrace are higher than the one in hilly land. (2) the COD content are respectively 303.56 mg/L (1.0 mm/min), 685.16 mg/L (2.0 mm/min), 617.66 mg/L (3.0 mm/min) in terrace in different rainfall intensity and the relevant values in hilly land are 419.63 mg/L, 644.62 mg/L, 721.17 mg/L, which indicates it’s more likely to happen the loss of organic matter in hilly land. Therefore， terrance engineering to hilly land can reduce nutrients loss, water and soil erosion, increase crop yield.

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