Variable Rate Watering And Contour Controlled Precision Sprinkler And Sprinkler Irrigation | | Posted on:2004-05-10 | Degree:Doctor | Type:Dissertation | | Country:China | Candidate:W T Han | Full Text:PDF | | GTID:1103360125462023 | Subject:Agricultural mechanization project | | Abstract/Summary: |  PDF Full Text Request | | ï¼·ï½ï½”ï½…ï½’ï¼ï½“ï½ï½–ｉｎｇ　ｉｒｒｉｇï½ï½”ｉï½ï½Žã€€ï½”ｅｃｈｎｉｑｕｅｓ　ｉｎｃｌｕｄｉｎｇ　ｔｈｅ　ｓï½ï½’ｉｎｋｌｅｒ　ï½ï½Žï½„　ｔｒｉｃｋｌｅ　ｉｒｒｉｇï½ï½”ｉï½ï½Žã€€ï½ˆï½ï½–ｅ　ｂｅｅｎ　ｔｈｅ　ｔｅｃｈｎｉｑｕｅｓ　ï½ï½Žï½…　ï½ï½•ï½“ｔ　ｔï½ï½‹ï½…　ｔï½ã€€ï½’ｅｄｕｃｅ　ｔｈｅ　ｃｒｉｓｉｓ　ï½ï½†ã€€ï½—ï½ï½”ｅｒ　ｓｈï½ï½’ï½”ï½ï½‡ï½…　ï½ï½Žï½„　ï½ï½ƒï½ˆï½‰ï½…ｖｅ　ｔｈｅ　ï½ï½ï½„ｅｒｎｉｚï½ï½”ｉï½ï½Žã€€ï½ï½†ã€€ï½ï½‡ï½’ｉｃｕｌｔｕｒｅ　ï½ï½“　ｔｈｅ　ｉｎｔｅｎｓｉï½ï½Žã€€ï½ï½†ã€€ï½—ï½ï½’ｌｄ　ｗï½ï½”ｅｒ　ｒｅｓï½ï½•ï½’ｃｅｓ　ｓｈï½ï½’ï½”ï½ï½‡ï½…．　Ｕｎｉｆï½ï½’ï½ï½‰ï½”ｙ　ｉｓ　ï½ï½Žï½…　ｉï½ï½ï½ï½’ï½”ï½ï½Žï½”　ｉｎｄｅｘ　ｔï½ã€€ï½…ï½–ï½ï½Œï½•ï½ï½”ｅ　ｔｈｅ　ｑｕï½ï½Œï½‰ï½”ｙ　ï½ï½†ã€€ï½“ï½ï½’ｉｎｋｌｅｒ　ｉｒｒｉｇï½ï½”ｉï½ï½Žï¼Žã€€ï¼¡ï½‰ï½ï½…ｄ　ï½ï½”　ｉï½ï½ï½’ï½ï½–ｉｎｇ　ｔｈｅ　ｉｒｒｉｇï½ï½”ｉï½ï½Žã€€ï½•ï½Žï½‰ï½†ï½ï½’ï½ï½‰ï½”ｙ　ï½ï½Žï½„　ｑｕï½ï½Œï½‰ï½”ï½™,　ｔｈｉｓ　ï½ï½ï½ï½…ｒ　ï½ï½•ï½”ｓ　ｆï½ï½’ï½—ï½ï½’ｄ　ï½ï½Žï½…　ｎｅｗ　ｓï½ï½’ｉｎｋｌｅｒ　ｉｒｒｉｇï½ï½”ｉï½ï½Žã€€ï½”ｅｃｈｎï½ï½Œï½ï½‡ï½™â€”Ｖï½ï½’ｉï½ï½‚ｌｅ　Ｒï½ï½”ｅ　Ｃï½ï½Žï½”ï½ï½•ï½’　Ｃï½ï½Žï½”ï½’ï½ï½Œï½Œï½…ｄ　Ｐｒｅｃｉｓｉï½ï½Žã€€ï¼³ï½ï½’ｉｎｋｌｅｒ　Ｉｒｒｉｇï½ï½”ｉï½ï½Ž(ＶＣＣＰＳＩ)．　ＶＣＣＰＳＩ　ｕｓｅｓ　ｔｈｅ　Ｖï½ï½’ｉï½ï½‚ｌｅ　Ｒï½ï½”ｅ　Ｃï½ï½Žï½”ï½ï½•ï½’　Ｃï½ï½Žï½”ï½’ï½ï½Œï½Œï½…ｄ　Ｐｒｅｃｉｓｉï½ï½Žã€€ï¼³ï½ï½’ｉｎｋｌｅｒ　(ＶＣＣＰＳ)　ｓï½ï½ï½ƒï½…ｄ　ｔï½ï½‡ï½…ｔｈｅｒ　ｗｈｅｎ　ï½ï½ï½…ï½’ï½ï½”ｉï½ï½Ž,　ｗｈｉｃｈ　ｃï½ï½Žã€€ï½…ｌｉï½ï½‰ï½Žï½ï½”ｅ　ｔｈｅ　ï½ï½„ｖｅｒｓｅ　ｉｎｆｌｕｅｎｃｅｓ　ｆｒï½ï½ã€€ï½”ｈｅ　ｃｉｒｃｌｅ　ｗｅｔｔｅｄ　ï½ï½’ï½…ï½ã€€ï½ƒï½ï½Žï½”ï½ï½•ï½’　ï½ï½Žã€€ï½”ｈｅ　ｓï½ï½ï½ƒï½‰ï½Žï½‡ã€€ï½ï½†ã€€ï½“ï½ï½’ｉｎｋｌｅｒｓ．　ＶＣＣＰＳＩ　ï½ï½’ï½ï½–ｉｄｅｓ　ï½ã€€ï½Žï½…ｗ　ｉｄｅï½ã€€ï½ï½Žï½„　ｔｅｃｈｎï½ï½Œï½ï½‡ï½™ã€€ï½”ï½ã€€ï½‰ï½ï½ï½’ï½ï½–ｅ　ｔｈｅ　ｕｎｉｆï½ï½’ï½ï½‰ï½”ｙ　ï½ï½Žï½„　ｑｕï½ï½Œï½‰ï½”ｙ　ï½ï½†ã€€ï½“ï½ï½’ｉｎｋｌｅｒ　ｉｒｒｉｇï½ï½”ｉï½ï½Žï¼Žã€€ï¼´ï½ˆï½‰ï½“　ï½ï½ï½ï½…ｒ　ｃï½ï½Žï½„ｕｃｔｓ　ï½ã€€ï½“ｙｓｔｅï½ï½ï½”ｉｃï½ï½Œã€€ï½ï½Žï½ï½Œï½™ï½“ｉｓ　ï½ï½Žã€€ï½”ｈｅ　ＶＣＣＰＳＩ　ï½ï½Žï½„　ｔｈｅ　ï½ï½ï½Šï½ï½’　ï½ï½ƒï½ˆï½‰ï½…ï½–ï½…ï½ï½…ｎｔｓ　ï½ï½’ｅ　ï½ï½“　ｆï½ï½Œï½Œï½ï½—ｉｎｇｓ:　 １．Ｔｈｅ　ｋｅｙ　ｃï½ï½ï½ï½ï½Žï½…ｎｔ　ｆï½ï½’　ｔｈｅ　ｓï½ï½’ｉｎｋｌｅｒ　ï½ï½ƒï½ˆï½‰ï½…ｖｉｎｇ　ｖï½ï½’ｉï½ï½‚ｌｅ　ｒï½ï½”ｅ　ï½ï½Žï½„　ｃï½ï½Žï½”ï½ï½•ï½’ｅｄ　ｃï½ï½Žï½”ï½’ï½ï½Œï½Œï½…ｄ　ｆｕｎｃｔｉï½ï½Žï½“ï¼ï¼³ï½”ï½ï½”ｉï½ï½Žï½ï½’ï½™ï¼ï½“ｌｉｃｅï¼ï½”ï½™ï½ï½…　Ｆｌï½ï½—　ï½ï½Žï½„　Ｔｈｒï½ï½—ï¼ï½„ｉｓｔï½ï½Žï½ƒï½…　Ａｄｊｕｓｔï½ï½’　(ＳＦＴＡ)　ｉｓ　ｄｅｖｅｌï½ï½ï½…ｄ．　Ｔｈｅ　ï½ï½ï½‰ï½Žã€€ï½ƒï½ï½Žï½“ｔｒｕｃｔｉï½ï½Žï½ï½Œã€€ï½ï½ï½’ï½ï½ï½…ｔｅｒｓ　ï½ï½’ｅ　ï½ï½Žï½ï½Œï½™ï½šï½…ｄ　ｕｎｄｅｒ　Ｗï½ï½”ｅｒ　ï¼ï½ï½–ï½…ï½ï½…ｎｔ　Ｐï½ï½’ｔｉï½ï½Œã€€ï¼²ï½…ｓｉｓｔï½ï½Žï½ƒï½…　Ｔｈｅï½ï½’ｙ．　Ｔｈｅ　ｎｅｗ　ï½ï½ï½„ｅｌ　ï½ï½†ã€€ï¼¶ï¼£ï¼£ï¼°ï¼³ï¼©ã€€ï½”ｈï½ï½”　ｕｓｅｓ　ｔｈｅ　ｃｉｒｃｌｅ　ï½ï½Žï½„　ｓｔï½ï½’ï¼ï½ï½Œï½‰ï½‹ï½…　ｃï½ï½Žï½”ï½ï½•ï½’　ＶＣＣＰＳ　ｓï½ï½ï½ƒï½…ｄ　ｆï½ï½’　ｉｒｒｉｇï½ï½”ｉï½ï½Žã€€ï½‰ï½“　ï½ï½’ï½ï½ï½ï½”ｅｄ　ｆï½ï½’　ｔｈｅ　ｆｉｒｓｔ　ｔｉï½ï½…．　　 ２．Ｔｈｅ　ï½ï½ï½…ï½’ï½ï½”ｉï½ï½Žã€€ï½…ｑｕï½ï½”ｉï½ï½Žã€€ï½†ï½ï½’　ＶＣＣＰＳ　ｉｓ　ｄｅｖｅｌï½ï½ï½…ｄ　ｆï½ï½’　ｔｈｅ　ｆｉｒｓｔ　ｔｉï½ï½…　ｔｈï½ï½”　ｄｅｓｃｒｉｂｅｓ　ｔｈｅ　ｒｅｌï½ï½”ｉï½ï½Žã€€ï½‚ｅｔｗｅｅｎ　ｔｈｒï½ï½—ï¼ï½„ｉｓｔï½ï½Žï½ƒï½…,　ｆｌï½ï½—　ｒï½ï½”ｅ　ï½ï½Žï½„　ｒï½ï½”ï½ï½”ｉｎｇ　ｓï½ï½…ｅｄ　ï½ï½†ã€€ï¼¶ï¼£ï¼£ï¼°ï¼³ï¼Žã€€ï¼´ï½ˆï½…　ｔｈｅï½ï½’ｅｔｉｃï½ï½Œã€€ï½†ï½Œï½ï½—　ｒï½ï½”ｅ　ï½ï½Žï½„　ｓï½ï½…ｅｄ　ï½ï½Žï½„　ｉｄｅï½ï½Œã€€ï½—ï½ï½”ｅｒ　ｄｉｓｔｒｉｂｕｔｉï½ï½Žã€€ï½ï½ï½”ｔｅｒｎ　ｆï½ï½’　ｔｈｅ　ｓｑｕï½ï½’ｅ　ï½ï½Žï½„　ｓｔï½ï½’ï¼ï½ï½Œï½‰ï½‹ï½…　ＶＣＣＰＳ　ï½ï½’ｅ　ｄｉｓｃｕｓｓｅｄ．　 ３．Ａ　ｎｅｗ　ｔｙï½ï½…　ï½ï½†ã€€ï½Œï½ï½”ï½…ï½’ï½ï½Œã€€ï½ï½’ï½’ï½ï½Žï½‡ï½…ï½ï½…ｎｔ　ï½ï½ï½„ｅｌ　ｉｓ　ï½ï½’ï½ï½ï½ï½”ｅｄ　ｔｈï½ï½”　ｃï½ï½Žã€€ï½“ï½ï½–ｅ　ｔｈｅ　ｃï½ï½“ｔ　ï½ï½†ã€€ï½ï½‰ï½ï½…　ｂｙ　７％　ｗｈｅｎ　ｓï½ï½’ｉｎｋｌｅｒｓ　ï½ï½’ｅ　ｓï½ï½ï½ƒï½…ｄ　ｉｎ　ｅｑｕｉｌï½ï½”ï½…ï½’ï½ï½Œã€€ï½”ｒｉï½ï½Žï½‡ï½Œï½…　ｗｈｉｌｅ　２５％　ｉｎ　ｉｓï½ï½“ｃｅｌｅｓ　ｔｒｉï½ï½Žï½‡ï½Œï½…　ｃï½ï½ï½ï½ï½’ｅｄ　ｗｉｔｈ　ｃï½ï½ï½ï½ï½Žã€€ï½ï½’ï½’ï½ï½Žï½‡ï½…ï½ï½…ｎｔ　ï½ï½ï½„ｅｌ．　Ｔｈｅ　ｉｎｆｌｕｅｎｃｅ　ï½ï½†ã€€ï½†ï½Œï½ï½—　ｒï½ï½”ｅ　ｖï½ï½’ｙｉｎｇ　ｆï½ï½’　ｔｈｅ　ＶＣＣＰＳ　ï½ï½Žã€€ï½”ｈｅ　ｓï½ï½’ｉｎｋｌｅｒ　ｓｙｓｔｅï½ã€€ï½ï½Žï½„　ｔｈｅ　ï½ï½’ï½’ï½ï½Žï½‡ï½…ï½ï½…ｎｔ　ï½ï½†ã€€ï½“ï½ï½’ｉｎｋｌｅｒ　ｒï½ï½”ï½ï½”ｉï½ï½Žï½ï½Œã€€ï½ï½Žï½‡ï½Œï½…　ï½ï½’ｅ　ｄｉｓｃｕｓｓｅｄ．　 ４．Ｔｈｅ　ｃï½ï½Žï½ƒï½…ï½ï½”　ï½ï½†ã€€ï¼²ï½…ｖｉｓ...
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