论文

Agricultural Nonpoint Source Pollution Loads Prediction Using Caesium-137 Tracing Technique in Black Soil Region, Northeast China

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  • 1. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130012;
    2. North China University of Water Resources and Electric Power, Zhengzhou, Henan 450011;
    3. Songliao Water Resources Commission, Ministry of Water Resources, Changchun, Jilin 130021

Received date: 2009-05-22

  Revised date: 2009-09-12

  Online published: 2010-01-20

Abstract

The Songnen Plain in Northeast China is an important base of cash grain and soybean in China. Nonpoint source nutrient loads (TN, TP, NH3-N, NO3--N, PO43--P) to the water bodies were estimated using 137Cs nuclear tracing technique and field monitoring method. The annual mean erosion thickness of black soil in the typical slops is within 0.120-0.525 cm, and the erosion intensity is 1355.0-7558.2 t/km2 in last 40 years. The annual mean values of pollution loads per square kilometer were TN 1.43 t, NH3-N 15.01 t, NO3--N 8.51 t, TP 0.42 t, PO43--P1.85 t, respectively. Water dissolved inorganic nitrogen and phosphorus accounted for 0.51% of total nitrogen, and 0.12% of total phosphorus. Caesium-137trating technique is an differentive to traditional methods.

Cite this article

YANG Yu-hong, YAN Bai-xing, SHEN Bo, CAO Hui-cong . Agricultural Nonpoint Source Pollution Loads Prediction Using Caesium-137 Tracing Technique in Black Soil Region, Northeast China[J]. SCIENTIA GEOGRAPHICA SINICA, 2010 , 30(1) : 124 -128 . DOI: 10.13249/j.cnki.sgs.2010.01.124

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