| FuZhou ShanZi reservoir is the second water resource in FuZhou .So far it has started to provided FuZhou citizen with water for drinking. The detective results of these recent dozen years showed:the eutrophication of ShanZi reservoir become serious day by day. The investegation data shows :the agricultural non-point pollution has been one of the main pollution to FuZhou ShanZi reservoir.In order to study on how much the influencing of the agricultural non-point pollution to the water quality of ShanZi reservoir .we sampled the water which would be analyzed and detected from different types of used land in our chosen area QiLi country from investigation around the reservoir ..Finally ,we got the conclusion as follows:1. The runoff made by rain acturally gave the contribution to the level of TP, TN, ammonia nitrogen in the reservoir.The influenced area could cover the whole reservoir ,influenced depth could come to about 10m below the water surface.2. The level of TP, TN, ammonia nitrogen and some other nutrients out from the runoff has the positive relationship with the rain volume in the two rain event.The rules nutrient elements out from the runoff of the each type of sampled land were basically consistent.The rice field and hill brook generally went up firstly and came down and then had the trend to balance;And the bamboo and forest came down firstly then went up .finally came to a balance.3. The nutrient substance content of the soil in each type of sampled land had some relationship with the concentration of nutrient substance out from runoff made by rain.4. According to formula,we evaluated the pollutants volume to the reservoir along ShanZireservoir area caused by the agricultural non-point pollution made by the rain from year 1996-2004. We found the most pollution of TP and TN to the reservoir happened in 1997,5.785 ton and 42.211 ton respectively .The results also showed the serious pollution happened in 1997.
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