ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

基于SVM的綠洲荒漠交錯帶土壤水分與地下水埋深反演
CSTR:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項目:

國家自然科學基金項目(U1303381、41261090),、新疆維吾爾自治區(qū)重點實驗室專項基金項目(2016D03001),、新疆維吾爾自治區(qū)科技支疆項目(201591101)、新疆大學博士生科技創(chuàng)新項目(XJUBSCX-2016015)和教育部促進與美大地區(qū)科研合作與高層次人才培養(yǎng)項目


Inversion of Soil Moisture and Shallow Groundwater Depth Based on SVM in Arid Oasis-Desert Ecotone
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 圖/表
  • |
  • 訪問統(tǒng)計
  • |
  • 參考文獻
  • |
  • 相似文獻
  • |
  • 引證文獻
  • |
  • 資源附件
  • |
  • 文章評論
    摘要:

    為深入研究淺層地下水,、植被和土壤的相互作用,,以新疆渭干河-庫車河綠洲為研究區(qū),通過Sentinel-1A數(shù)據(jù)和Landsat數(shù)據(jù)以及土壤含水率,、地下水埋深數(shù)據(jù),,結(jié)合植被以及土壤條件,,通過支持向量機模型(Support vector machine,SVM)定量反演研究區(qū)土壤水分以及地下水埋深信息,。結(jié)果表明:0~10cm的土壤含水率與地下水埋深之間的相關(guān)性最高,。通過地形校正C模型(Topographic correction model),得到溫度植被干旱指數(shù)(Temperature vegetation drought index,,TVDI)精度有所提高,。建立不同參數(shù)的SVM模型反演地下水埋深可行,對于單因子建模,,TVDIMSAVI構(gòu)建的模型精度最高,,建模集R2=0.74,均方根誤差(Root mean square error,,RMSE)為4.66%,驗證集R2=0.70,,RMSE為465%,。相比只考慮單因子(后向散射系數(shù)(σ0soil)或TVDI),σ0soil和TVDIMSAVI組合共同作用于模型精度最好,,建模集R2=0.86,,RMSE為4.16%,驗證集R2=0.92,,RMSE為2.73%,。利用最優(yōu)模型參數(shù)結(jié)果反演土壤水分區(qū)域和地下水埋深區(qū)域,其結(jié)果精度較好,。地下水埋深反演結(jié)果平均相對誤差為8.23%,,優(yōu)于研究區(qū)以往研究18.06%的結(jié)果。

    Abstract:

    In order to further study the interaction between shallow groundwater, vegetation and soil of arid and semiarid regions, the database of the Sentinel-1A, Landsat images, soil moisture and the groundwater depth were utilized to quantitatively analyze the information of soil moisture and groundwater depth in the study area by the model of support vector machine (SVM) regression algorithm. Furthermore, the comparison of optical remote sensing and microwave remote sensing collaborative inversion in soil moisture and groundwater depth was also analyzed. By the survey of soil moisture and groundwater depth in the study area, the results indicated that the highest accuracy in SVM model was the correlation between soil water content in 0~10cm and groundwater depth. The accuracy of temperature vegetation drought index (TVDI) was improved, through the C calibration model. It was feasible to invert the groundwater depth by SVM model with different parameters. For single factor modeling, the model constructed by TVDIMSAVI had the highest accuracy and the R2 of modeling set was 0.74, the value of RMSE was 4.66%, and the R2 of verification set was 0.70, the value of RMSE was 4.65%, compared with only single factor (σ0soil or TVDI), σ0soil and TVDIMSAVI combination work with the highest model accuracy, R2 was 0.86, and RMSE was 4.16%, the R2 of verification set was 0.92, and RMSE was 2.73%. The results of the optimal model parameters were used to retrieve the soil moisture and groundwater with good accurate. The average relative error of groundwater was 8.23%, which was better than the previous results of the study area of 18.06%.

    參考文獻
    相似文獻
    引證文獻
引用本文

張鈞泳,丁建麗,譚嬌.基于SVM的綠洲荒漠交錯帶土壤水分與地下水埋深反演[J].農(nóng)業(yè)機械學報,2019,50(3):221-230. ZHANG Junyong, DING Jianli, TAN Jiao. Inversion of Soil Moisture and Shallow Groundwater Depth Based on SVM in Arid Oasis-Desert Ecotone[J]. Transactions of the Chinese Society for Agricultural Machinery,2019,50(3):221-230.

復制
分享
文章指標
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2018-09-04
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期: 2019-03-10
  • 出版日期: 2019-03-10
文章二維碼