唐山市沙流河镇园林绿化总量控制分析

Analysis of garden and open space whole scale controlling at Shaliuhe town of Tangshan city

运用系统论和生态要素阈值法 ,从沙流河镇人口承载力、碳氧平衡和水资源供应等生态要素方面 ,剖析该镇生态平衡的制约因素 ,寻求适宜的园林绿化总量。结果显示 ,沙流河镇水资源总量为 14 90 5 5万m3 ·a-1,2 0 0 1年全镇水资源超采 86 3 86万m3 ,其中农业用水量最大 ,占 95 5 4 % ;该镇耗氧量 14 75万t·a-1,耗氧比制氧多6 91万t·a-1,镇区仅燃烧耗氧量就占全镇耗氧量的 71 0 0 %。鉴于此 ,建议对全镇土地利用情况进行调整 ,将园林绿地面积由 2 0 0 1年的 4 33hm2 调整为 2 0 10年的 12 0 8hm2 ;提出了退耕还林、强化镇区绿化和优化园林景观布局等实施措施。

In order to find out the right scale of garden and open space at Shaliuhe town of Tangshan city in HeBei province, from the aspects of population carrying capacity, balance of carbon and oxygen and water resource provision, the sticking points of the town on the basis of system theory and ecological element threshold method were analysed. The results showed that the number of the whole obtainable water resource at the town is 14?905 5 thousand m 3·a -1 , and the amount utilized exceeds the whole obtainable water resource by 8?638 6 thousand m 3 in 2001, 95 54 % of which were used in agriculture. The oxygen consuming was 147?509 8?t·a -1 , 71 00 % of which was the oxygen consuming of burning at the township, and it was 69?109 1?t·a -1 more than providing oxygen quantity. Hence, soil resource of the whole town was regulated, and the garden planning scale was adjusted from 433?hm 2 in 2001 to 1?208?hm 2 in 2010. Some measures, such as reforesting on farm land, strengthening the garden planning at the township, optimizing the garden planning layout and so on, were brought forward.