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J. Jpn. Soc. Soil Phys.
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No. 33, p. ,+,2 ,**/

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  *Evaluating River Water Quality through Land Use Analysis
and N Budget Approaches
Ryusuke HATANO** Field Science Center for Northern Biosphere, Hokkaido University, Sapporo *0*ῌ2/23, Japan
Abstract
Increase of reactive nitrogen associated with production of food and feed has increased N load
into aquasphere and atmosphere. This has induced the problems such as eutrophication, acidiﬁcation and global warming.

What will be going on in future? In order to predict it and to mitigate

food production managements, monitoring of N loads in various scales is required.

How shall we

conduct them ? This paper will focus its discussion on the monitoring of NO--N load from soils
based on the previous studies which were conducted in the di#erent scales, such as soil structurelevel, ﬁeld level and basin level.
Key words : soil structure, ﬁeld, basin, nitrate, surplus nitrogen(/RS"s+2z% Galloway and Cowl-+    ing, ,**,& `{C|}B2K~+23*  +33*  +**   

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26

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subset©agriculture
Galloway, J.N. and Cowling, E.B. (,**,) : Reactive
nitrogen and the world : ,** years of change.

    !" #    $ 

Ambio, -+ : 0.ῌ1+.
Green, P.A., Vorosmarty, C. J., Meybeck, M., Gallo- 

way, J.N., Peterson, B. J. and Boyer, E.W. (,**.) :%& '( )* +,- .

Pre-industrial and contemporary ﬂuxes of nitro-/++,-0123   45

gen through rivers : a global assessment based

65  7892: ;<=>?@AB!" CD

EF5G°±< C0m )\]4 ^

0ῌ ῍ ῐ ῏ ῎H I

JKLMIon typology. Biogeochemistry, 02 : 1+ῌ+*/.

V#0Wªῌ«¬­XYῌ®Z¯[ _+32-d : >-² /. : .3*ῌ.32.

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V#0Wª ῌ «¬­XY ῌ ®Z¯[ _+32.d : A³´ABx µ_`C)  ,¶ ab¶ ^² // : -/+ῌ-/0.

X JKLMIh)*iF5QP jP!

Hatano, R., Sakuma, T. and Okajima, H. (+32/) : The

TY +kl,mRcnopQPCPG X'Xsource-sink e#ect of clayey soil peds on solute

V- qr./st5u 0v wxy ?z
4 x{ 12

transport. Soil Sci. Plant Nutr., -+ : +33ῌ,+-.

qr3$ (4Hatano, R. and Sakuma, T. (+33+ a) : A plate model for|3$12 T} 0v~P 45( 5solute transport through aggregated soil col-6X A?7PQPY 89 #

umns. I. Theoretical description. Geoderma, /* ::F5G 4 T} ; [\<F(=XQ 'Cw5uC(CPG  I+-ῌ,-.

 

Hatano, R. and Sakuma, T. (+33+ b) : A plate model forC>?# @

solute transport through aggregated soil col-TCPG  T78RAB{ 

umns. II. Experimental results and application ofI 4CD ./EF''2pQPG 78Ru'

the model. Geoderma, /* : ,/ῌ-0.

CY (4| wqGXQ 8H{9Hatano, R., Kawamura, N., Ikeda, J. and Sakuma, T.

2+xy+ I{928{J(+33,) : Evaluation of the e#ect of morphologicalRC!(QPG nT #(B q

features of ﬂow paths on solute transport by; : A2 ¡¢£E¤HrN0s¥¦

27

using fractal dimensions of methylene blue

a rural area of central Hokkaido, Japan. Soil Sci.

staining patterns. Geoderma, /- : -+ῌ...

Plant Nutr. /* : +*3ῌ++1.

Hatano, R. (+332) : Regression model to predict trav :Organisation for Economic Co-Operation and Devel-

el time for chloride leaching throughout pedons

opment (OECD) (,**+) : Environmental Indica-using soil morphological characteristics. Nutr.

tors for Agriculture-Methods and Results, http :Cycl. Agroecosyst., /* : ,01ῌ,03.

//www.oecd.org/dataoecd/*/3/+3+00,3.pdf.

Hatano, R. and Booltink, H.W.G. (+332) : Using fractal

Pampolino, M.F. Urushiyama, T. and Hatano, R. (,***) :dimensions of stained ﬂow patterns in clay soils

Detection of nitrate leaching through bypass

to predict bypass ﬂow. In : P. Baveye, J.-Y.

ﬂow using Pan Lysimeter, Suction Cup andParlange, B.A. Stewart (eds) “Fractals in Soil Sci-

Resin Capsule. Soil Sci. Plant Nutr. .0 : 1*-ῌ1+,.

ence”, CRCpress, Boca Raton. ,0,ῌ,22.

 ,*** : 

,   !" !#$
%& : '()* +, 1* : 3+.ῌ3+3.

Peierls, B.L., Caraco, N.F., Pace, M.L. and Cole, J. J.
(+33+) : Human inﬂuence on river nitrogen. Nature,-/* : -20ῌ-21.
Pinder, G.F. and Jones, J.F. (+303) : Determination of ,**, : -./0123456789

the ground-water component of peak discharge:) ;<9= ;<>?@A)"BCDEfrom the chemistry of total runo#. Water Re-

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sources Research, / : .-2ῌ../.

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[ : ,**/  +  0 [sources of nitrogen pollution in stream water in(^·¸ ¹ 33 º »,**/¼

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