土壤与作物
土壤與作物
토양여작물
Soil and Crop
2014年
3期
99-104
,共6页
土壤墒情%单位线%衰减速度%RC电路%动态分析
土壤墑情%單位線%衰減速度%RC電路%動態分析
토양상정%단위선%쇠감속도%RC전로%동태분석
soil moisture content%unit hydrograph%decay rate%resistance capacitance circuit%dynamic analysis
根据土壤墒情与电学RC ( Resistance capacitance )电路电流变化规律的共同特征,从理论上对土壤墒情动态变化趋势进行了研究,获得了利用瞬时单位线法推求土壤含水量的表达式。通过对湘乡实验站土壤重量含水率理论计算值与实验值进行对比分析,其平均相对误差小于0.02。实例证明, RC阻容模型之瞬时单位线法推求土壤含水量简单实用,可为干旱分析和土壤墒情研究提供理论依据。图3,表1,参11。
根據土壤墑情與電學RC ( Resistance capacitance )電路電流變化規律的共同特徵,從理論上對土壤墑情動態變化趨勢進行瞭研究,穫得瞭利用瞬時單位線法推求土壤含水量的錶達式。通過對湘鄉實驗站土壤重量含水率理論計算值與實驗值進行對比分析,其平均相對誤差小于0.02。實例證明, RC阻容模型之瞬時單位線法推求土壤含水量簡單實用,可為榦旱分析和土壤墑情研究提供理論依據。圖3,錶1,參11。
근거토양상정여전학RC ( Resistance capacitance )전로전류변화규률적공동특정,종이론상대토양상정동태변화추세진행료연구,획득료이용순시단위선법추구토양함수량적표체식。통과대상향실험참토양중량함수솔이론계산치여실험치진행대비분석,기평균상대오차소우0.02。실예증명, RC조용모형지순시단위선법추구토양함수량간단실용,가위간한분석화토양상정연구제공이론의거。도3,표1,삼11。
According to the change rule of the soil moisture content and electrical RC ( Resistance capacitance ) parallel circuit , the change trend of soil moisture dynamic was analyzed and the formula of soil moisture was obtained by using the instantaneous unit hydro -graph method.Through the comparison between soil gravimetric water content and modeled water content in Xiangxiang experiment sta -tion,the relative error less than 0.02 was obtained.It is proposed that the instantaneous unit hydrograph method for the estimation of soil moisture content is simple and practical ,which can provide the theoretical basis for analysis of drought and soil moisture research .