Study On Effect Of Tourism On Surface Runoff Under Forests Of Lakeside In Jiuzhaigou World Nature Heritage Reserve

Jiuzhaigou world nature heritage reserve is located the Qinghai-Tibet Plain and the Sichuan transition ecology interlocks area, ecological environment frail, biodiversity rich, the natural vegetation type and the mountain lake is multitudinous, is in the world the most unique nature protection area. The water is Jiuzhaigou's soul, Protects the good water resources is travel sustainable development basis of Jiuzhaigou world nature heritage reserve. In recent years, Jiuzhaigou world nature heritage reserve along with the tourist current capacity increased and the life facility increased, the tourism was increased, the environment pressure was increased. Along with traveling disturbance intensity increasing, the core area as well as the peripheral region water resources receives the partial pollution or the pollution, in some land sector, water bodies' eutrophication sign was appeared, lake ecosystem of Jiuzhaigou world nature heritage reserve is not an isolated ecosystem, but is and the neighboring land vegetation system close relation, the sandiness and the nutrient were carried by surface runoff of the peripheral land ecosystem, the nutrient carried by the groundwater runoff, and the lake frail water body environment mutually affects can cause the water body eutrophication, causes the lake ecosystem degeneration. How reduces the nutrient and the sandiness input, slows down the lake eutrophication question, restores the degenerated environment, becomes the urgent question.Research depends on "Jiuzhaigou and Huanglong" project of water resources protection startup by Sichuan scientific and technological department, From April to September of 2005, orientation detecting last 6 months monitor to runoff and dynamically nutrient loss caused by tourism in key scenic spot of JiuZhaigou world nature heritage reserve. Choose bank vegetation by intensive tourism spot primitive forest and colored lake in JiuZhaigou world nature heritage reserve, set up 9 runoff plot, monitor surface, sandiness and nutrient loss, choose 7 comparison plot monitor in step, assess and surface runoff and nutrient loss trends by tourism, at the same time, We set up 10 limitless runoff plot determine surface runoff and gathered neighbouring lakeside water in colored lake and pearl lake, in order to expound interreaction of ring lake bank vegetation and water quality. Investigate and observe the data to analysis indicate,(1) Jiuzhaigou world nature heritage reserve surface runoff capacity changes along with the traveling activity disturbance surface cover and the soil quality change. After the traveling activity disturbs accommodates significantly compared to the comparison soil, porosity becomes small, biggest hold water quantity becomes small, Along with the disturbance intensity increase, the surface runoff capacity increases.(2) Analyzed correlation data of 36 precipitation events, there is a change on surface runoff in differently rains, taking one with another, surface runoff capacity is 0-1.58mm, surface runoff...