基于RSEI的巢湖流域生態環境質量時空變化分析

李鴻芝

摘要?[目的]分析巢湖流域生態環境質量時空變化。[方法]利用巢湖流域2006年和2017年2個時相的Landsat系列衛星影像，采用新型的遙感生態指數（RSEI）對研究區這11年間的生態環境質量變化進行分析。[結果]隨著城市建成區的不斷擴展，巢湖流域生態質量總體出現下降趨勢，研究時間內RSEI均值從0.562下降至0.500;生態環境較差和差的區域面積增加了2.63%，生態環境優良區域面積減少了18.79%。在空間分布上，合肥市區及舒城縣生態質量相對較差，流域西南的岳西縣部分地區和廬江縣生態質量較好，且研究時間內合肥市區生態變差，肥西縣北部和廬江縣生態逐漸變好。[結論]總體來看，植被覆蓋的減少和建筑用地的擴張是導致巢湖流域生態質量下降的重要因素。

關鍵詞?遙感生態指數;巢湖流域;生態環境;Landsat數據

中圖分類號?S181.3文獻標識碼?A

文章編號?0517-6611（2019）16-0082-05

doi：10.3969/j.issn.0517-6611.2019.16.024

開放科學（資源服務）標識碼（OSID）：

Temporal?and?Spatial?Changes?of?Ecological?Environment?Quality?in?Chaohu?Basin?Based?on?RSEI

LI?Hong?zhi

（College?of?Geography?and?Tourism，?Anhui?Normal?University，Wuhu，Anhui?241000）

Abstract?[Objective]?The?research?aimed?to?analyze?the?temporal?and?spatial?changes?in?the?ecological?environment?quality?of?the?Chaohu?Basin.[Method]Using?the?Landsat?series?of?satellite?images?from?the?Chaohu?Basin?in?2006?and?2017，?the?new?remote?sensing?ecological?index?（RSEI）?was?used?to?analyze?the?ecological?environment?quality?changes?in?the?study?area?during?the?11?years.[Result]With?the?continuous?expansion?of?urban?built?up?areas，?the?overall?ecological?quality?of?Chaohu?Basin?had?decreased.?The?average?RSEI?value?decreased?from?0.562?to?0.500?during?the?studied?period;?the?areas?with?relatively?poor?and?poor?ecological?environment?increased?by?2.63%，?and?those?with?good?ecological?environment?decreased?by?18.79%.In?terms?of?spatial?distribution，?the?ecological?quality?of?Hefei?City?and?Shucheng?County?was?relatively?poor，?and?that?of?part?of?Yuexi?County?and?Lujiang?County?was?good.?Besides，?during?the?studied?period，?the?ecological?environment?in?Hefei?became?worse，?while?that?in?the?north?of?Feixi?County?and?Lujiang?County?became?better.[Conclusion]Overall，?the?reduction?of?vegetation?cover?and?the?expansion?of?construction?land?are?the?important?factors?leading?to?the?decline?of?ecological?quality?in?the?Chaohu?Basin.

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