ISWC OpenIR  > 水保所知识产出(1956---)
考虑灌溉参数空间变异的区域畦灌模拟与验证
董勤各1,2; 许迪3; 章少辉3; 白美健3; 李益农3
2017
Source Publication农业工程学报
Volume33Issue:9Pages:1-9
Abstract

精确评估区域畦田灌水质量有助于提高农田灌水管理水平, 而具有空间变异性的灌溉参数如何有效表征是影响
区域畦田灌水质量精确模拟评价的关键因素。为此, 该研宄的目的在于借助Mont e - C arlo 抽样, 建立考虑畦灌参数空间变
异性的区域畦灌模拟方法。采用M onte - C arl o 抽样将具有空间变异性的区域灌溉参数( 如入畦单宽流量、土壤砂粒含量、
黏粒含量、土壤容重等) 离散表征为若干个灌溉参数样本, 依次输入田块尺度畦灌地表水流-土壤水动力学耦合模型, 以
模拟评价区域畦灌过程。基于3 次区域畦灌试验的实测数据和1 个对比的确定性畦灌模拟方法, 验证建立的模型的模拟
效果。结果表明, 所建模拟方法与确定性模拟方法模拟计算的灌水效率和灌水均匀具一定差异, 所建模型的模拟值与实
测值间的灌溉定额和田间水利用系数相对误差分别为9 . 9 5% ?
1 2 . 2 3% 和8 . 3 9 %?
1 0 . 2 1% , 而基于现有模型的相对误差则
分别为1 4 . 1 5% ?
1 6 . 78 %和1 3 . 8 7% ?
1 5 . 8 8% , 畦田平均土壤含水率实测值与所建模型模拟值的累积分布趋势表现出良好
的一致性。上述指标表明所建模拟方法有效缩小了区域灌溉参数空间均化处理所带来的模拟误差范围较大等问题, 为区
域畦田灌溉优化设计和管理提供了技术支撑

Other Abstract

T hepe rfo rmanceev al uat io no f re gi o nal s c al eb o rde ri rriga tio n
pl a

s a nimpo rta nt ro l ei n the impro ve mento f
sur fac eirrigat io n ma nage me ntl eve l
, 
b uttheex i st ing
mo de l s
 pre s entthe sho r tc oming s su ch as  le s sa cc ur ate ly
c apturingthe
spati a l vari ab i li ty
o f r egi o nal s ca lei rriga ti on
par amete rs .S o the exi t ing
mo del s c anno tb eeffecti ve ly
appl i ed toa naly ze the
pe rfo rmance o f regi o nal  sc al eb o rder  i rrigat io n s ys tem. T o s o lve thi s
p ro bl e m

the bo r der sur fac e- sub sur fac eflow mo del wa s
ap pli e dto des c rib ethe sur fac eand s ub su rfa cewat er flow .T he co ns er vative comp l eteh

dro d
ynami ce qu atio n a ndtheRic hards
e quat io nw er eappl i e dto de sc ribethe sur fac ewa ter flow ands ub s urfa cew ate r fl owi nb o rde r i rrigat io n
,r es pe ctiv ely .The
fi ni te -v ol u me appro ach wa sa ppl i ed to spa ti al ly
di s cre ti zethe se
 gov erning
e qu atio ns to ob tain
 go o dmas s co ns er vati o n abi l ity.
T he P i cardite ra tio n a ppro a chwa s intr o duced to ob tai nth el i nea rizati o n of thi s no nl i ne aralgebr ai csys te m.Themas s
c o nse rvat io n  compo nento f s ur fac eflow mo del a nds ubs ur fac eflow mo del w ere i ter ative ly
c oupl e dat the same t ime stept o
o bta in the co nve rge ncev al ue o f sur fac efl ow depth
, 
and the n th emomentum c o ns erva ti on  co mpo nento f su rface flow mo de l
wa s e xte rnal l y
co upl e dba se do n thec o nv er genc ev alueo fb o th th esu rfa ce flow depth and infil t ratio n ra te to up date th esu rfa ce
flow ve lo c ity .S o l ut io ns we renumer ic al ly
c ompute du si ng
an impr ov ed hyb rid nume ri cal metho dfo r s urface fl ow mo de l a nd a
pr o po s ednumer ic al s o luti o nmetho dwi th high-o rde r a ccur acy
fo r s ubs ur fac eflowmo del .Mo nt e-C ar lo  sampl i ng
metho dwa s
us e dto a cc urate ly
c aptur ethes pa tial va riabi l ity
o f re gio na l s cal e ir ri gati o n
 paramete rs and
ge nera te a l arge numbe r o f b o rder
i rri
ga ti on
pa ramete rs samp le s
, whi ch we rei npu tto b o rde r sur fac e

sub sur fac emo del
, re sp ect ive ly .
Co ns eque ntly ,
 the b o rder
sur fac e
- subs ur fac ew ater fl owp ro ce s se s o f regi o nalsc al e co ul dbe ac cur atelys imu lat ed .Thre et ime s bo rd er irri gat io n
e xperime nt sa tr e gi o nal sc al ewer epe rfo rme dto val i date th epr o po s edmo del i nMaw anI rrigati o nDi s t ri ct
, lo cate di n
D o ngy ing Ci ty , S hando ng
P ro vi nce . S o i l s ampl e sw ere c o l le cted at4 depths fr om theto p ,
mid dl e
, 
andbo tomo fth eb o rder
fi e ldto a naly ze so il bul kden si ty , s o i lp art i cl e si ze di stributi o n
,  ands o i l mo i stu re .The so i l hy draul i cpa ramet er swe re
t ra ns fo rme dfro m th eab ove ment io neds o i l p ro pe rt i es us i ng theRo seta mo de l
.The rel at ive el evat io n va lue s o f theb o rder
bo ttomw ere o bs er ved us i ng
awa te r l eve l
 gauge .The sur fac eflow depthw a smea s ure du si ngwate r de pth me as uring
devi c es
,
whi c hwer e
pl a ced ateve ry
ob s er vati o n
p o i nt befo r ethei rrigati o nw as i ni ti ate d.The s urfa ce flowde pt hw as us ed to  est imate
Ma nn ing

sro ughne s s co effi c ie nt .Andu ni tdi s c harge
, bo rder l ength
, a ndbo r der width w er eo b se rve di nM arc h2 0 1 2
,
N ove mbe r 2 0 1 2
, 
a ndMa rch 2 0 1 3 .T heva li dati o n r es ul ts s howedtha tth e
pr o po s edmo del c o ul dwe ll  simul ate regi o nal s cal e
bo r der i rri
ga tio n
 pro c es s e s
, 
a nd
p re se nte dve ry go o dmo d el ing
ac cur acy .
S
pe ci fi ca l ly ,
t he re l at iveer ro rs betw ee nthemea su re d
an dsimula ted val ue s byt hep ro po s ed sto chast i cparamete r i rrigati o nmo de l w ere 9 . 9 5 % - 1 2 . 2 3 % an d8 . 3 9 % - 1 0 . 2 1 % fo r
i rriga ti on
quo ta a ndfie l dw ate rut i l iz at io n co effi c i ent
,
re sp ectiv el y .B y
co ntr as t
, there la tive er ro r so f ir ri gat io n
 quo ta and fie l d
wa ter util i za ti on co e ffic ie ntba s ed o ntheexi st ing determini st ic pa ramet er i rrigati o n mo de l swer e1 4 . 1 5% - 1 6 . 7 8 %an d
1 3 . 8 7% - 1 5 . 8 8 %
, re sp ect ivel y .Addit io nal ly, t hecu mul ati vep ro bab il i ty di strib uti o n tr end so fa ve rageso il mo i stu rea fter
i rriga ti on b etwe entheme a sur eda nds imul a te dva lue s pr es entthesa ti sfact o r
y pe rfo rma nce
.T hu s
, thepr o po s ed mo de l
o ve rc ome s the s ho rt comings o fe xi s ti ng
mo del sa nd
 pro vi de sa  us efu lnume ri cal a naly
s i sto o l fo r themana gementan dd es i gn
o f re gi o nal sc al eb o rde r i rrigati o n sys tem .

Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8445
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水土保持研宄所
2.中国科学院水利部水土保持研宄所
3.中国水利水电科学研宄院流域水循环国家重点实验室2
Recommended Citation
GB/T 7714
董勤各,许迪,章少辉,等. 考虑灌溉参数空间变异的区域畦灌模拟与验证[J]. 农业工程学报,2017,33(9):1-9.
APA 董勤各,许迪,章少辉,白美健,&李益农.(2017).考虑灌溉参数空间变异的区域畦灌模拟与验证.农业工程学报,33(9),1-9.
MLA 董勤各,et al."考虑灌溉参数空间变异的区域畦灌模拟与验证".农业工程学报 33.9(2017):1-9.
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