Question

あ

取手市界をたどると必ずしも子貝川に沿っておらず堤外新田付近などでは大きく反れていることが分かる。なぜ取手市界がこのように引かれてるのか100字程度で答えなさい。
という問題が分からないので教えていただきたいです。

"
"
B
"
"
m
ル
"
2
"
山
"
"
"
"
"
"
"
"
"
"
M'i
NO
"
M
"
"
"
ON
"
山
"
"
"
"
T
"
"
"
"
"
"
"
"
"
314
"
"1
"
A
"
取手桜が丘 C
"
"
"
11
"
"
"
"
"
"
JU
"
"
取手市
"
"
"
"
"
9943
"
み
B
"
長
" 田
"
"
"
"
01
41
"
高須本田
"
"A
"
高須
"
"
"
"
19
"
"
W
"
高須下
Y
"
〃
"
〃
〃
"
"
"
w
〃
〃
"
〃
4
〃
"
"
"
〃
も
"
神浦
2
の
A "
"
新田
1%
"
"
大
"
"
お
"
"
11
〃
"
"
"
"
"
"
m
"
"
A
5
"
"
"
豊田町
"
"
"
"
"
小貝川
"
大留第二
PID
"
"
"
"
"
"
"
道仙田
"
"
"
"
高須町
20:11
"
"
"
"
"
"
"
"
"
"
"
"
大留町
11
"
"
"
11
M
"
"
"
"
"
"
"
"
"
"
"
"
"
"
ツ
"
"
N
"
"
"
"
"
"
"
"
BL
"
"
"
"
"
"
0
"
5
"
北町
長沖町
"
"
"
"
"
"
"
"
"
"
"
"
"
"
六
"
"
B
"
"
"
"
"
"
"
"
長沖新田町
山

Answer 1

地道な地理

昔は、小貝川は大きく蛇行していて、現在の取手市の境界はその当時の川に沿って設定され、河川が改修された現在も境界はそのままになっているため。（６９字）