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<a name="_Toc347096849"></a><a name="_Toc351710073"><span style="font-family:黑体; font-size:14pt">三江源区域生态环境状况评价</span></a>
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利用<span style="letter-spacing:-3pt"> </span><span style="font-family:'Times New Roman'">2015 </span>年度三江源综合试验区土地利<span style="letter-spacing:0.05pt">用</span><span style="font-family:'Times New Roman'">/</span>土地覆盖遥感监测数据<span style="letter-spacing:-1.7pt">、</span>环境统 计数据及其他专题数据<span style="letter-spacing:-0.15pt">，</span>依<span style="letter-spacing:-0.15pt">据</span>《生态环境状<span style="letter-spacing:0.1pt">况</span>评价技术规<span style="letter-spacing:-0.15pt">范</span>（试行<span style="letter-spacing:-6pt">）</span><span style="letter-spacing:-0.05pt">》</span><span style="font-family:'Times New Roman'">(</span><span style="font-family:'Times New Roman'; letter-spacing:-0.1pt">H</span><span style="font-family:'Times New Roman'; letter-spacing:0.1pt">J</span><span style="font-family:'Times New Roman'">/T192- 2006</span><span style="font-family:'Times New Roman'; letter-spacing:-0.05pt">)</span>，以县域为评价单元，评价区域生态环境状况。
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评价结果表明<span style="font-family:'Times New Roman'">2015 </span>年度三江源综合试验区各县域生态环境状况指数介于 <span style="font-family:'Times New Roman'">42.7</span><span style="font-family:'Times New Roman'; letter-spacing:-0.05pt">4</span>～<span style="font-family:'Times New Roman'">72.21 </span>之间，生态环境状况以等级<span style="font-family:'Times New Roman'; letter-spacing:-0.05pt">“</span>良<span style="font-family:'Times New Roman'; letter-spacing:0.05pt">”</span>为主；其中<span style="letter-spacing:-3pt"> </span><span style="font-family:'Times New Roman'">20 </span>个县域生态环境状 况等级<span style="letter-spacing:-0.05pt">为</span><span style="font-family:'Times New Roman'; letter-spacing:-0.05pt">“</span>良<span style="font-family:'Times New Roman'; letter-spacing:-0.05pt">”</span><span style="letter-spacing:-2.05pt">，</span>占三<span style="letter-spacing:0.1pt">江</span>源综合试验区总面积的<span style="letter-spacing:-2.95pt"> </span><span style="font-family:'Times New Roman'">90.91</span><span style="font-family:'Times New Roman'; letter-spacing:-0.05pt">%</span><span style="letter-spacing:-2.05pt">；</span><span style="font-family:'Times New Roman'">2 </span>个县域<span style="letter-spacing:0.1pt">生</span>态环境状况等 级<span style="letter-spacing:-0.05pt">为</span><span style="font-family:'Times New Roman'; letter-spacing:-0.05pt">“</span>一般<span style="font-family:'Times New Roman'; letter-spacing:-0.05pt">”</span>，占三江<span style="letter-spacing:0.1pt">源</span>综合试验区总面积的<span style="letter-spacing:-3pt"> </span><span style="font-family:'Times New Roman'">9.09</span><span style="font-family:'Times New Roman'; letter-spacing:-0.05pt">%</span>。
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<span style="letter-spacing:0.1pt">2015 年三江源综合试验区区生态环境状况评价图</span>
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<span style="font-family:'Times New Roman'">2015 </span>年<span style="letter-spacing:0.1pt">度</span>，<span style="letter-spacing:0.1pt">三</span>江<span style="letter-spacing:0.1pt">源综</span>合试<span style="letter-spacing:0.1pt">验</span>区<span style="letter-spacing:0.1pt">黄</span>南<span style="letter-spacing:0.1pt">州</span>河<span style="letter-spacing:0.1pt">南县</span>生态<span style="letter-spacing:0.1pt">环</span>境<span style="letter-spacing:0.1pt">状</span>况<span style="letter-spacing:0.1pt">指</span>数<span style="letter-spacing:0.1pt">最高</span>，其次 是黄南州同仁县<span style="letter-spacing:-1.45pt">、</span>果洛州甘德县<span style="letter-spacing:-1.45pt">、</span>班玛县<span style="letter-spacing:-1.45pt">；</span>海西州唐古拉山镇生态环境状况指数 最低，其次是玉树州曲麻莱县。
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2015 年度三江源综合试验区各县生态环境状况指数对比图
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与<span style="letter-spacing:-3pt"> </span><span style="font-family:'Times New Roman'">2014 </span>年度相比，三江源综合试验区生态环境状况指数变化幅度介于
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<span style="font-family:'Times New Roman'; letter-spacing:-0.05pt">-</span><span style="font-family:'Times New Roman'">1.</span><span style="font-family:'Times New Roman'; letter-spacing:-0.05pt">8</span><span style="font-family:'Times New Roman'">7</span>～<span style="font-family:'Times New Roman'">0.03 </span>之间<span style="letter-spacing:-5.4pt">，</span>三<span style="letter-spacing:0.1pt">江</span>源综合试验区各县域生态环境状况指数较上年度相比均无 明显变化，生态环境状况保持稳<span style="letter-spacing:0.05pt">定</span>。
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三江源综合试验区各县生态环境状况指数（EI 值）年际变化图
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