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題名 | 放牧集水區土壤沖蝕與養分流失推估 |
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作者姓名(中文) | 鄭鑑鏘; 萬鑫森; | 書刊名 | 中華農學會報 |
卷期 | 163 1993.09[民82.09] |
頁次 | 頁39-55 |
分類號 | 436.124 |
關鍵詞 | 土壤; 沖蝕; 放牧集水區; 養分; 流失; 推估; Pasture watershed; Erosion; Nutrients; Prediction; |
語文 | 中文(Chinese) |
中文摘要 | 農業非點源汙染模式AGNPS,是近年來在國廣泛使用的電腦模式;可以估算逕流水質,分析集水區內各種土地利用、保育處理方式和經營管理方式所產生的環境影響。基本組成包括水文、沖蝕、泥沙搬運、養分搬運和化學需氧量。本試驗應用AGNPS模式,模擬臺灣臺南地區放牧集水區水文、土壤沖蝕和養分流失資料;並實際觀測瞭解推估值與實測值的相關性。由觀測七次降雨的結果得知:推估的逕流量、COD、可溶性氮磷鉀與實測值的差異均未達顯著水準;泥砂產量差異雖未達顯著水準,但如果以下式:(X+0.051) ton/ha×0.68校正之,可更理想。附著於泥砂的氮磷鉀量,因泥砂產量的校正後,推估值可臻合理。在適當的載牧力和管理情況下,逕流水中的COD和氮磷濃度,未超過行政院環保署所訂的放流水標準。 |
英文摘要 | Agricultural Non-Point Source Pollution Model, AGNPS, a widely used computer model in recent years, can be used to estimate run off quality, to analyze the effects on environment caused by different ways of management and utilization of the land of pasture watersheds. The basic components of the model are hydrology, erosion, sediment transport, nutrient transport, and chemical oxygen demand. AGNPS was used to simulate the hydrology, soil erosion and nutrient loss of pasture watershed at Tainan in southern Taiwan. Field data was obtained at the same time to find the relations between the estimated values and the observed one. The results of seven observations of rainfall showed that the predicted sediment was too high. It should be correcte4d by the formula as following: (X+0.051) ton/ha ×0.68. The predicted nitrogen, phosphate and potassium absorbed on sediments were reasonable right after such a sediment correction. The COD and concentration of soluble nitrogen and phosphate were in compliance with the regulation of Environmental Protection Administration of Executive Yuan if the area is under properly grazing system and management. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。