CAJ | 학술논문

选择江苏省仪征市陈集镇2个典型的农村小流域进行水质监测和景观空间分异耦合关系研究,结果表明:不同地势区景观结构差异明显,水环境特征也有较大差别.随着地势的降低,总氮、总磷浓度在小徐庄流域呈降低趋势,而高塘流域则先升高后降低;总磷、总氮、氨氮、硝态氮浓度与源景观比例、沟渠密度和景观多样性指数具有良好的相关关系,逐步回归分析发现,94%的总氮浓度由源景观比例和沟渠密度决定,80%以上的氨氮和硝态氮浓度由源景观比例决定.因此,可以通过对流域景观结构的优化调整,达到对流域景观中养分的有效管理,实现对农业非点源污染的控制.
선택강소성의정시진집진2개전형적농촌소류역진행수질감측화경관공간분이우합관계연구,결과표명:불동지세구경관결구차이명현,수배경특정야유교대차별.수착지세적강저,총담、총린농도재소서장류역정강저추세,이고당류역칙선승고후강저;총린、총담、안담、초태담농도여원경관비례、구거밀도화경관다양성지수구유량호적상관관계,축보회귀분석발현,94%적총담농도유원경관비례화구거밀도결정,80%이상적안담화초태담농도유원경관비례결정.인차,가이통과대류역경관결구적우화조정,체도대류역경관중양분적유효관리,실현대농업비점원오염적공제.
Two typical small rural watersheds in Chenji Town of Yizheng were selected in a study of coupling relationships between water quality and landscape stucture. Results show that (1) landscape structure varied sharply with terrains, and so did characters of the water environment. With declining terrain, concentrations of TN and TP decreased in Xiaoxuzhuang watershed, but rose first and then fell in Gaotang watershed;(2) good correlations were observed of concentrations of TP, TN, NH_3-N, and NO_3~--N with proportion of source landscape, ditch density, landscape diversity index;and (3) stepwise regression revealed that 94% of TN depended on proportion of source landscape and ditch density, while over 80% of NH_3-N and NO_3~--N on proportion of source landscape. It is advisable to run effective management of nutrients in the watershed landscape and reinforce control of agricultural non-point source pollution by optimizing landscape structure of the watersheds.