榆林地區(qū)水土流失敏感性時空特征
發(fā)布時間:2019-01-09 11:02
【摘要】:用10km×10km的網(wǎng)格,把榆林地區(qū)劃分為527個單元樣地,采用加權(quán)和法,計算每個單元的水土流失敏感性指數(shù),并在Arcgis中進行Kriging空間插值,分析水土流失敏感性時空特征。結(jié)果表明:全區(qū)無不敏感級別。2000年中度敏感區(qū)面積占全榆林面積的31.33%。高度敏感區(qū)面積占51.808%。極度敏感區(qū)占16.862%。2005年中度敏感區(qū)面積占35.876%。高度敏感區(qū)面積占48.153%。極度敏感區(qū)占15.971%。2010年輕度敏感區(qū)占0.229%。中度敏感區(qū)面積占28.047%。高度敏感區(qū)面積占44.176%。極度敏感區(qū)面積占27.548%?傮w來說,東部水土流失敏感性較高,西部敏感性較低。從2000年到2010年,中度敏感性和高度敏感性面積減少了,而極度敏感性面積增加了。
[Abstract]:The Yulin area was divided into 527 unit plots by 10km 脳 10km grid. The sensitivity index of soil erosion was calculated by weighted sum method, and the spatial and temporal characteristics of soil erosion sensitivity were analyzed by Kriging interpolation in Arcgis. The results showed that the area of the whole area was 31.33% of the total area of Yulin in 2000. The area of highly sensitive area is 51.808. Extremely sensitive areas accounted for 16.862.The area of moderately sensitive areas accounted for 35.876 in 2005. The area of highly sensitive area was 48.153. Extremely sensitive area accounted for 15.971.The mildly sensitive area accounted for 0.229 in 2010. The area of moderate sensitive area was 28.047. The area of highly sensitive area was 44.176. The area of extremely sensitive area was 27.548%. Generally speaking, the sensitivity of soil erosion in the east is higher than that in the west. From 2000 to 2010, moderate and highly sensitive areas decreased, while extremely sensitive areas increased.
【作者單位】: 長安大學(xué)地球科學(xué)與資源學(xué)院;山西農(nóng)業(yè)大學(xué)林學(xué)院;
【基金】:國家自然科學(xué)基金資助項目(31140042) 陜西省自然科學(xué)基礎(chǔ)研究計劃基金資助項目(2009JM5004) 陜西省軟科學(xué)計劃基金資助項目(2007RK21) 長安大學(xué)中央高;鹳Y助項目(2013G1271102)
【分類號】:S157.1
本文編號:2405535
[Abstract]:The Yulin area was divided into 527 unit plots by 10km 脳 10km grid. The sensitivity index of soil erosion was calculated by weighted sum method, and the spatial and temporal characteristics of soil erosion sensitivity were analyzed by Kriging interpolation in Arcgis. The results showed that the area of the whole area was 31.33% of the total area of Yulin in 2000. The area of highly sensitive area is 51.808. Extremely sensitive areas accounted for 16.862.The area of moderately sensitive areas accounted for 35.876 in 2005. The area of highly sensitive area was 48.153. Extremely sensitive area accounted for 15.971.The mildly sensitive area accounted for 0.229 in 2010. The area of moderate sensitive area was 28.047. The area of highly sensitive area was 44.176. The area of extremely sensitive area was 27.548%. Generally speaking, the sensitivity of soil erosion in the east is higher than that in the west. From 2000 to 2010, moderate and highly sensitive areas decreased, while extremely sensitive areas increased.
【作者單位】: 長安大學(xué)地球科學(xué)與資源學(xué)院;山西農(nóng)業(yè)大學(xué)林學(xué)院;
【基金】:國家自然科學(xué)基金資助項目(31140042) 陜西省自然科學(xué)基礎(chǔ)研究計劃基金資助項目(2009JM5004) 陜西省軟科學(xué)計劃基金資助項目(2007RK21) 長安大學(xué)中央高;鹳Y助項目(2013G1271102)
【分類號】:S157.1
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